dt-bindings: clock: sun55i-a523-ccu: Add missing NPU module clock

The main clock controller on the A523/T527 has the NPU's module clock.
It was missing from the original submission, likely because that was
based on the A523 user manual; the A523 is marketed without the NPU.

Reviewed-by: Andre Przywara <[e-mail]>
Acked-by: Rob Herring (Arm) <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Chen-Yu Tsai <[e-mail]>

include/dt-bindings/clock/sun55i-a523-ccu.h

···
 #define CLK_FANOUT0		176
 #define CLK_FANOUT1		177
 #define CLK_FANOUT2		178
+#define CLK_NPU			179
 
 #endif /* _DT_BINDINGS_CLK_SUN55I_A523_CCU_H_ */