staging: r8188eu: correct macro spelling mistake

Correct a macro spelling mistake in rtw_fw.c.

MAX_REG_BOLCK_SIZE -> MAX_REG_BLOCK_SIZE

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220412185754.8695-2-straube.linux@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>