gpu: nvgpu: Move as.c to mm/as.c

This file, as.c, is an MM related source file. As
such it should be placed below mm/.

Note there's no relevant JIRA task for this.

Change-Id: Ie1062897e209bba2efb4ed4983fdd4966a688bfd
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1986177
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/Makefile

@@ -225,6 +225,7 @@ nvgpu-y += \
 	common/mm/allocators/lockless_allocator.o \
 	common/mm/gmmu/page_table.o \
 	common/mm/gmmu/pd_cache.o \
+	common/mm/as.o \
 	common/mm/vm.o \
 	common/mm/vm_area.o \
 	common/mm/nvgpu_mem.o \
@@ -236,7 +237,6 @@ nvgpu-y += \
 	common/string.o \
 	common/pramin.o \
 	common/semaphore.o \
-	common/as.o \
 	common/rbtree.o \
 	common/vbios/bios.o \
 	common/falcon/falcon.o \

drivers/gpu/nvgpu/Makefile.sources

@@ -53,6 +53,7 @@ srcs :=	os/posix/nvgpu.c \
 	common/mm/allocators/lockless_allocator.c \
 	common/mm/gmmu/page_table.c \
 	common/mm/gmmu/pd_cache.c \
+	common/mm/as.c \
 	common/mm/vm.c \
 	common/mm/vm_area.c \
 	common/mm/nvgpu_mem.c \
@@ -91,7 +92,6 @@ srcs :=	os/posix/nvgpu.c \
 	common/pramin.c \
 	common/semaphore.c \
 	common/string.c \
-	common/as.c \
 	common/rbtree.c \
 	common/ltc/ltc.c \
 	common/ltc/ltc_gm20b.c \