defconfig: sdmshrike: use uncompressed linux kernel

Time wasted on decompression is much more than time saved
on ufs loading, boot time can be improved by around 100ms.

Change-Id: Ia6118cb2820622b7c20961a488b3094f0c4cc1d1
Signed-off-by: Jiacheng Zheng <jiaczhen@codeaurora.org>