defconfigs: Increase the default CMA heap from 5MiB to 16MiB

With the frame buffer now coming from an ARM CMA allocation
increase the size of the CMA heap to accommodate the default
max 1920x1080 RGBA32 frame buffers (8MiB).

CONFIG_CMA_SIZE_MBYTES was specified as 5, but reality was that
was rounded up to 8MiB at runtime. Increase it to 16MiB.

Signed-off-by: Dave Stevenson <[email protected]>

Author: 6by9

arch/arm/configs/bcm2709_defconfig

@@ -397,7 +397,7 @@ CONFIG_NFC=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_DMA_CMA=y
-CONFIG_CMA_SIZE_MBYTES=5
+CONFIG_CMA_SIZE_MBYTES=16
 CONFIG_MTD=m
 CONFIG_MTD_BLOCK=m
 CONFIG_MTD_M25P80=m

arch/arm/configs/bcmrpi_defconfig

@@ -391,7 +391,7 @@ CONFIG_NFC=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_DMA_CMA=y
-CONFIG_CMA_SIZE_MBYTES=5
+CONFIG_CMA_SIZE_MBYTES=16
 CONFIG_MTD=m
 CONFIG_MTD_BLOCK=m
 CONFIG_MTD_M25P80=m

arch/arm64/configs/bcmrpi3_defconfig

@@ -387,7 +387,7 @@ CONFIG_NFC=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_DMA_CMA=y
-CONFIG_CMA_SIZE_MBYTES=5
+CONFIG_CMA_SIZE_MBYTES=16
 CONFIG_MTD=m
 CONFIG_MTD_BLOCK=m
 CONFIG_MTD_NAND=m