configs: am335x_guardian: add memtest configs

- Add mtest, meminfo commands

Signed-off-by: Gireesh Hiremath <Gireesh.Hiremath@in.bosch.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Link: https://lore.kernel.org/r/20210611161350.2141-6-Gireesh.Hiremath@in.bosch.com

configs/am335x_guardian_defconfig

@@ -7,6 +7,8 @@ CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_ENV_SIZE=0x40000
 CONFIG_ENV_OFFSET=0x500000
 CONFIG_DEFAULT_DEVICE_TREE="am335x-guardian"
+CONFIG_SYS_MEMTEST_START=0x80000000
+CONFIG_SYS_MEMTEST_END=0x81000000
 CONFIG_AM33XX=y
 CONFIG_TARGET_AM335X_GUARDIAN=y
 CONFIG_SPL_SERIAL_SUPPORT=y
@@ -43,6 +45,8 @@ CONFIG_CMD_SPL=y
 CONFIG_CMD_SPL_NAND_OFS=0x0
 CONFIG_CMD_ASKENV=y
 # CONFIG_CMD_FLASH is not set
+CONFIG_CMD_MEMINFO=y
+CONFIG_CMD_MEMTEST=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_GPT=y
 CONFIG_CMD_I2C=y