gpu: nvgpu: Fix unit test build break.

Remove nvgpu-gr library usage from Makefile.
mock-iospace is enough to support for the needed
iospace.

Jira NVGPU-2192

Change-Id: I21a5158c69ca23039dac5e509a9a0c711848e178
Signed-off-by: vinodg <vinodg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2284451
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-by: Nicolas Benech <nbenech@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: Nicolas Benech <nbenech@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

userspace/units/pmu/Makefile

@@ -24,20 +24,15 @@ OBJS   = nvgpu-pmu.o
 MODULE = nvgpu-pmu
 
 LIB_PATHS += -lfalcon_utf \
-	     -lnvgpu-gr \
 	     -lmock-iospace
 
 include ../Makefile.units
 
 lib$(MODULE).so: falcon_utf \
-		 nvgpu-gr \
 		 mock-iospace
 
 falcon_utf:
 	$(MAKE) -C ../falcon
 
-nvgpu-gr:
-	$(MAKE) -C ../gr
-
 mock-iospace:
 	$(MAKE) -C ../mock-iospace

userspace/units/pmu/Makefile.tmk

@@ -29,7 +29,6 @@ NVGPU_UNIT_SRCS=nvgpu-pmu.c
 
 NVGPU_UNIT_INTERFACE_DIRS := \
 	$(NV_COMPONENT_DIR)/../falcon \
-	$(NV_COMPONENT_DIR)/../gr \
 	$(NV_COMPONENT_DIR)/../mock-iospace \
 	$(NV_SOURCE)/kernel/nvgpu/drivers/gpu/nvgpu