Now that single defconfig can be used for booting AM64 EVM and SK,
default device tree will not work for selecting dtb for kernel.
Update the env to select right dtb based on eeprom.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Current BSS allocation of SPL is as below:
size spl/u-boot-spl
text data bss dec hex filename
144572 5484 1752 151808 25100 spl/u-boot-spl
But 20KB is allocated currently for BSS. Reduce it to 4KB and
save some space for stack.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>