x86: Use a common definition of MSR_IA32_PERF_CTL

Remove the duplicate definition as it is not needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/broadwell/cpu.c b/arch/x86/cpu/broadwell/cpu.c
index 297f1e0..61003a6 100644
--- a/arch/x86/cpu/broadwell/cpu.c
+++ b/arch/x86/cpu/broadwell/cpu.c
@@ -57,7 +57,7 @@
 	}
 
 	perf_ctl.hi = 0;
-	msr_write(IA32_PERF_CTL, perf_ctl);
+	msr_write(MSR_IA32_PERF_CTL, perf_ctl);
 
 	debug("CPU: frequency set to %d MHz\n",
 	      ((perf_ctl.lo >> 8) & 0xff) * CPU_BCLK);