clk: xgene: Remove unused setup.h include

This include doesn't look to be used, and compiling this file on
arm64 still works, so remove it.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/clk-xgene.c

@@ -27,7 +27,6 @@
 #include <linux/clkdev.h>
 #include <linux/clk-provider.h>
 #include <linux/of_address.h>
-#include <asm/setup.h>
 
 /* Register SCU_PCPPLL bit fields */
 #define N_DIV_RD(src)			(((src) & 0x000001ff))