cpu/intel/haswell: Rename HASWELL_BCLK to CPU_BCLK

This is just to ease merging with Broadwell.

Tested with BUILD_TIMELESS=1, Asrock B85M Pro4 remains identical.

Change-Id: I9239489fe48f04714e6626b57ef07ca8b3013024
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46910
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/cpu/intel/haswell/haswell_init.c

@@ -596,7 +596,7 @@ static void set_max_ratio(void)
 	wrmsr(IA32_PERF_CTL, perf_ctl);
 
 	printk(BIOS_DEBUG, "CPU: frequency set to %d\n",
-	       ((perf_ctl.lo >> 8) & 0xff) * HASWELL_BCLK);
+	       ((perf_ctl.lo >> 8) & 0xff) * CPU_BCLK);
 }
 
 static void configure_mca(void)