The BIT macro is a better way to define register bits, for 1 << bit is
risky for 32-bit registers.

Also remove the definition of SMIAPP_DATA_TRANSFER_IF_1_CTRL_RD_EN which
has a value of zero.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>