Changed the 'if' condition for pinmux register offset to 'mask' value
to be able to set PINMUX0. This would have been skipped otherwise
since PINMUX0 is at offset '0'.
Signed-off-by: Hemant Pedanekar <hemantp@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>