board: sam9x60_curiosity: reserve cma memory of 8m

Reserve CMA memory of 8M for EGT applications to succesfully allocate dumb
buffers.This mitigates low memory issues in sam9x60 curiosity while
launching EGT applications.

Signed-off-by: Hari Prasath Gujulan Elango <[email protected]>
Acked-by: Ludovic Desroches <[email protected]>
Signed-off-by: Cristian Birsan <[email protected]>

Author: gehariprasath

board/microchip/sam9x60_curiosity/uboot-env.txt

@@ -5,7 +5,7 @@ at91_prepare_video_bootargs=test -n $display_var && setenv at91_video_bootargs v
 at91_set_display=test -n $pda && setenv display $pda
 video=${video_mode}
 board_name=sam9x60_curiosity
-bootargs=console=ttyS0,115200 root=/dev/mmcblk0p2 rw rootwait rootfstype=ext4 atmel.pm_modes=standby,ulp0
+bootargs=console=ttyS0,115200 root=/dev/mmcblk0p2 rw rootwait cma=8m rootfstype=ext4 atmel.pm_modes=standby,ulp0
 bootcmd=run at91_set_display; run at91_pda_detect; run at91_prepare_video_bootargs; run at91_prepare_bootargs; run at91_prepare_overlays_config; run bootcmd_boot;
 bootcmd_boot=fatload mmc 0:1 ${loadaddr} ${board_name}.itb; bootm ${loadaddr}#kernel_dtb${at91_overlays_config};
 bootdelay=1