clk: mmp: pxa168: fix GPIO clock enable bits

According to the datasheet, only bit 0 of APBC_GPIO should be controlled
for the clock enable. Bit 1 is marked as reserved (always write 0).

Signed-off-by: Doug Brown <doug@schmorgal.com>
Link: https://lore.kernel.org/r/20220612192937.162952-9-doug@schmorgal.com


Signed-off-by: Stephen Boyd <sboyd@kernel.org>