gpu: nvgpu: allow building as a separate module

Include object files of gk20a, gm20b and vgpu in the same composite
object nvgpu.o in the top-level makefile, and remove the old makefiles.
This helps in building the driver as a separate module.

Bug 1476801

Change-Id: I93531c0f1a20e46904a429e492f8ed32e4f0c4a1
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/557971
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

drivers/gpu/nvgpu/Makefile

@@ -1,8 +1,66 @@
 GCOV_PROFILE := y
 
+ccflags-y += -Idrivers/gpu/nvgpu
+ccflags-y += -Idrivers/video/tegra/host
+ccflags-y += -Idrivers/devfreq
 ccflags-y += -Wno-multichar
 ccflags-y += -Werror
 
-obj-$(CONFIG_GK20A)	+= gk20a/
+obj-$(CONFIG_GK20A) := nvgpu.o
-obj-$(CONFIG_GK20A)	+= gm20b/
+
-obj-$(CONFIG_TEGRA_GR_VIRTUALIZATION) += vgpu/
+nvgpu-y := \
+	gk20a/gk20a.o \
+	gk20a/as_gk20a.o \
+	gk20a/ctrl_gk20a.o \
+	gk20a/fifo_gk20a.o \
+	gk20a/channel_gk20a.o \
+	gk20a/channel_sync_gk20a.o \
+	gk20a/debug_gk20a.o \
+	gk20a/dbg_gpu_gk20a.o \
+	gk20a/regops_gk20a.o \
+	gk20a/gr_gk20a.o \
+	gk20a/kind_gk20a.o \
+	gk20a/mm_gk20a.o \
+	gk20a/pmu_gk20a.o \
+	gk20a/priv_ring_gk20a.o \
+	gk20a/semaphore_gk20a.o \
+	gk20a/fence_gk20a.o \
+	gk20a/clk_gk20a.o \
+	gk20a/therm_gk20a.o \
+	gk20a/gr_ctx_gk20a_sim.o \
+	gk20a/gr_ctx_gk20a.o \
+	gk20a/gk20a_gating_reglist.o \
+	gk20a/gk20a_scale.o \
+	gk20a/gk20a_sysfs.o \
+	gk20a/ltc_gk20a.o \
+	gk20a/fb_gk20a.o \
+	gk20a/hal.o \
+	gk20a/hal_gk20a.o \
+	gk20a/gk20a_allocator.o \
+	gk20a/cde_gk20a.o \
+	gk20a/platform_gk20a_generic.o \
+	gk20a/tsg_gk20a.o \
+	gm20b/hal_gm20b.o \
+	gm20b/ltc_gm20b.o \
+	gm20b/gr_gm20b.o \
+	gm20b/gr_gm20b.o \
+	gm20b/fb_gm20b.o \
+	gm20b/fifo_gm20b.o \
+	gm20b/gr_ctx_gm20b.o \
+	gm20b/gm20b_gating_reglist.o \
+	gm20b/acr_gm20b.o \
+	gm20b/pmu_gm20b.o \
+	gm20b/clk_gm20b.o \
+	gm20b/mm_gm20b.o \
+	gm20b/regops_gm20b.o
+
+nvgpu-$(CONFIG_TEGRA_GK20A) += gk20a/platform_gk20a_tegra.o
+nvgpu-$(CONFIG_SYNC) += gk20a/sync_gk20a.o
+
+nvgpu-$(CONFIG_TEGRA_GR_VIRTUALIZATION) += \
+	gk20a/platform_vgpu_tegra.o \
+	vgpu/ltc_vgpu.o \
+	vgpu/gr_vgpu.o \
+	vgpu/fifo_vgpu.o \
+	vgpu/mm_vgpu.o \
+	vgpu/vgpu.o

drivers/gpu/nvgpu/gk20a/Makefile

@@ -1,44 +0,0 @@
-GCOV_PROFILE := y
-ccflags-y += -Idrivers/gpu/nvgpu
-ccflags-y += -Idrivers/video/tegra/host
-ccflags-y += -Idrivers/devfreq
-ccflags-y += -Wno-multichar
-ccflags-y += -Werror
-
-nvgpu-y := \
-	gk20a.o \
-	as_gk20a.o \
-	ctrl_gk20a.o \
-	fifo_gk20a.o \
-	channel_gk20a.o \
-	channel_sync_gk20a.o \
-	debug_gk20a.o \
-	dbg_gpu_gk20a.o \
-	regops_gk20a.o \
-	gr_gk20a.o \
-	kind_gk20a.o \
-	mm_gk20a.o \
-	pmu_gk20a.o \
-	priv_ring_gk20a.o \
-	semaphore_gk20a.o \
-	fence_gk20a.o \
-	clk_gk20a.o \
-	therm_gk20a.o \
-	gr_ctx_gk20a_sim.o \
-	gr_ctx_gk20a.o \
-	gk20a_gating_reglist.o \
-	gk20a_scale.o \
-	gk20a_sysfs.o \
-	ltc_gk20a.o \
-	fb_gk20a.o \
-	hal.o \
-	hal_gk20a.o \
-	gk20a_allocator.o \
-	cde_gk20a.o \
-	platform_gk20a_generic.o \
-	tsg_gk20a.o
-nvgpu-$(CONFIG_TEGRA_GK20A) += platform_gk20a_tegra.o
-nvgpu-$(CONFIG_SYNC) += sync_gk20a.o
-nvgpu-$(CONFIG_TEGRA_GR_VIRTUALIZATION) += platform_vgpu_tegra.o
-
-obj-$(CONFIG_GK20A) := nvgpu.o

drivers/gpu/nvgpu/gm20b/Makefile

@@ -1,19 +0,0 @@
-GCOV_PROFILE := y
-ccflags-y += -Idrivers/gpu/nvgpu
-ccflags-y += -Wno-multichar
-ccflags-y += -Werror
-
-obj-$(CONFIG_GK20A)  = \
-	hal_gm20b.o \
-	ltc_gm20b.o \
-	gr_gm20b.o \
-	gr_gm20b.o \
-	fb_gm20b.o \
-	fifo_gm20b.o \
-	gr_ctx_gm20b.o \
-	gm20b_gating_reglist.o \
-	acr_gm20b.o \
-	pmu_gm20b.o \
-	clk_gm20b.o \
-	mm_gm20b.o \
-	regops_gm20b.o

drivers/gpu/nvgpu/vgpu/Makefile

@@ -1,10 +0,0 @@
-GCOV_PROFILE := y
-ccflags-y += -Idrivers/gpu/nvgpu
-ccflags-y += -Wno-multichar
-
-obj-$(CONFIG_TEGRA_GR_VIRTUALIZATION)  = \
-	ltc_vgpu.o \
-	gr_vgpu.o \
-	fifo_vgpu.o \
-	mm_vgpu.o \
-	vgpu.o