dt-bindings: clock: mt7622: Add AFE_MRGIF clock

Add the missing AFE Merge Interface clock to MT7622 to make use of
it in the audio subsystem.

While at it, also remove the useless CLK_AUDIO_NR_CLK definition.

Signed-off-by: AngeloGioacchino Del Regno <[e-mail]>
Acked-by: Rob Herring (Arm) <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

include/dt-bindings/clock/mt7622-clk.h

···
 #define CLK_AUDIO_MEM_ASRC4		44
 #define CLK_AUDIO_MEM_ASRC5		45
 #define CLK_AUDIO_AFE_CONN		46
-#define CLK_AUDIO_NR_CLK		47
+#define CLK_AUDIO_AFE_MRGIF		47
 
 /* SSUSBSYS */