clk: sunxi-ng: fix PRCM CCU CLK_NUMBER value

The CLK_NUMBER value of PRCM CCU is wrongly set to (CLK_APB0_PWD + 1),
which prevented the IR mod clock from being set up.

Change it to (CLK_IR + 1) in order to correctly get IR mod set up.

Fixes: cdb8b80b ("clk: sunxi-ng: add support for PRCM CCUs")

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>