db845c: Set the flash block size to 4096

While running system/core/fs_mgr/tests/adb-remount-test.sh
device-mapper reports h/w logical block size to be 4096.
So updating the BOARD_FLASH_BLOCK_SIZE accordingly.

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Change-Id: Ia300194969da0bfb5ab47b77b130da7be3acc577
1 file changed