spi: Keep chipselect assertion during one message
spi: Keep chipselect assertion during one message

During all transfers in one message, the device will not be chagned.
So we don't need to deassert chipselect during one message.

Signed-off-by: Kyoungil Kim <d62bf96249e9a6d21b1ade31463a8375562db13f@samsung.com>
Signed-off-by: Grant Likely <9069e6f5a2b566e2674a0ba1e2bf39c12c195fad@secretlab.ca>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs