TI am335x: Apply Kconfig use conventions

Change-Id: Ic3c26fd7b1dd8a6731abc9a63b9ca17e084074b2
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5291
Tested-by: build bot (Jenkins)
Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>
2 files changed