add variant defconfigs

Change-Id: Ib3b7169e0899838e4d39020d03287e7fd824aa4e
mmc: card: Skip secure erase on MoviNAND; causes unrecoverable corruption.

commit 3550ccdb9d8d350e526b809bf3dd92b550a74fe1 upstream.

For several MoviNAND eMMC parts, there are known issues with secure
erase and secure trim.  For these specific MoviNAND devices, we skip
these operations.

Specifically, there is a bug in the eMMC firmware that causes
unrecoverable corruption when the MMC is erased with MMC_CAP_ERASE
enabled.

References:

http://forum.xda-developers.com/showthread.php?t=1644364
https://plus.google.com/111398485184813224730/posts/21pTYfTsCkB#111398485184813224730/posts/21pTYfTsCkB

Change-Id: Iaa6509716b0ad7930e9b3a97a9f8576abf1d91c0
change power button to KEY_POWER

Change-Id: I511a113ce203a118fc18fbd1dff1cd6516130b71