NFC: Fix NFC firmware download issue

Due to insufficient kernel buffer size, NFC firmware
download fails during NFC initialization.

Increased kernel buffer size to support
frame size of 554 in FW download mode.

Change-Id: I93dc7a51116f121475529e5becb0a0d213d1ce2c
Signed-off-by: Tapas Dey <tdey@codeaurora.org>