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: I1e870389da1221a01b1a785ff1e5b6b175a88117
Signed-off-by: Tapas Dey <tdey@codeaurora.org>