arch/x86: Fix most of remaining issues detected by checkpatch

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

ERROR: do not use assignment in if condition
ERROR: trailing statements should be on next line
ERROR: Macros with complex values should be enclosed in parentheses
ERROR: switch and case should be at the same indent
WARNING: char * array declaration might be better as static const
WARNING: else is not generally useful after a break or return
WARNING: storage class should be at the beginning of the declaration
WARNING: void function return statements are not generally useful
WARNING: break is not useful after a goto or return
WARNING: Single statement macros should not use a do {} while (0) loop
WARNING: sizeof *t should be sizeof(*t)
WARNING: Comparisons should place the constant on the right side of the test

TEST=Build and run on Galileo Gen2

Change-Id: I39d49790c5eaeedec5051e1fab0b1279275f6e7f
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18865
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/arch/x86/cpu.c b/src/arch/x86/cpu.c
index 4b82759..ff82661 100644
--- a/src/arch/x86/cpu.c
+++ b/src/arch/x86/cpu.c
@@ -118,7 +118,7 @@
 	{ X86_VENDOR_SIS,       "SiS SiS SiS ", },
 };
 
-static const char *x86_vendor_name[] = {
+static const char * const x86_vendor_name[] = {
 	[X86_VENDOR_INTEL]     = "Intel",
 	[X86_VENDOR_CYRIX]     = "Cyrix",
 	[X86_VENDOR_AMD]       = "AMD",
@@ -209,7 +209,7 @@
 			if ((cpu->vendor == id->vendor) &&
 				(cpu->device == id->device))
 				return driver;
-			if (X86_VENDOR_ANY == id->vendor)
+			if (id->vendor == X86_VENDOR_ANY)
 				return driver;
 		}
 	}
@@ -264,7 +264,8 @@
 		cpu->device -= c.x86_mask;
 		set_cpu_ops(cpu);
 		cpu->device += c.x86_mask;
-		if (!cpu->ops) die("Unknown cpu");
+		if (!cpu->ops)
+			die("Unknown cpu");
 		printk(BIOS_DEBUG, "Using generic CPU ops (good)\n");
 	}
 
@@ -278,8 +279,6 @@
 	post_log_clear();
 
 	printk(BIOS_INFO, "CPU #%d initialized\n", index);
-
-	return;
 }
 
 void lb_arch_add_records(struct lb_header *header)