soc/intel/braswell: Fix most of the issues detected by checkpatch

Fix the following errors and warnings detected by checkpatch.pl:

ERROR: that open brace { should be on the previous line
ERROR: return is not a function, parentheses are not required
WARNING: braces {} are not necessary for any arm of this statement
WARNING: line over 80 characters
WARNING: braces {} are not necessary for single statement blocks
WARNING: Avoid unnecessary line continuations
WARNING: break is not useful after a goto or return
WARNING: else is not generally useful after a break or return

False positives are generated by checkpatch for the following test:
ERROR: Macros with complex values should be enclosed in parentheses

TEST=Build for cyan

Change-Id: I19048895145b138a63100b29f829ff446ff71b58
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18871
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Tested-by: build bot (Jenkins)

src/soc/intel/braswell/cpu.c

@@ -229,7 +229,6 @@ void soc_init_cpus(device_t dev)
 	printk(BIOS_SPEW, "%s/%s ( %s )\n",
 			__FILE__, __func__, dev_name(dev));
 
-	if (mp_init_with_smm(cpu_bus, &mp_ops)) {
+	if (mp_init_with_smm(cpu_bus, &mp_ops))
 		printk(BIOS_ERR, "MP initialization failure.\n");
-	}
 }