dt-bindings: clock: imx8mm: don't use multiple blank lines

Avoid the following checkpatch warning:

include/dt-bindings/clock/imx8mm-clock.h:284: check: Please don't use
multiple blank lines

Signed-off-by: Marcel Ziswiler <[e-mail]>
Reviewed-by: Abel Vesa <[e-mail]>
Signed-off-by: Abel Vesa <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

include/dt-bindings/clock/imx8mm-clock.h

···
 #define IMX8MM_CLK_CLKOUT2_DIV			256
 #define IMX8MM_CLK_CLKOUT2			257
 
-
 #define IMX8MM_CLK_END				258
 
 #endif