amd-k8-mce: remove a stray break statement

This was a leftover of converting from a switch to an if/else
somewhere between 3.4 and 4.0.

It also looks suspicious that MCEQUIRK_K7_BANK0 is not actually used
anywhere. Perhaps amd_k7_mcheck_init() and amd_k8_mcheck_init() were
intended to get (partially) folded?

Signed-off-by: Jan Beulich <jbeulich@novell.com>

xen/arch/x86/cpu/mcheck/amd_k8.c

@@ -92,7 +92,6 @@ enum mcheck_type amd_k8_mcheck_init(struct cpuinfo_x86 *c)
 			/* Enable error reporting of all errors */
 			wrmsrl(MSR_IA32_MCx_CTL(i), 0xffffffffffffffffULL);
 			wrmsrl(MSR_IA32_MCx_STATUS(i), 0x0ULL);
-			break;
 		}
 	}