x86: don't compare pointers to 0

x86_vendor_name is defined as

static const char *const x86_vendor_name[]

So its elements should not be compared to 0.

Remove superfluous paranthesis.

Problem identified with Coccinelle.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c
index e13786e..1c42584 100644
--- a/arch/x86/cpu/cpu.c
+++ b/arch/x86/cpu/cpu.c
@@ -143,8 +143,8 @@
 {
 	const char *name;
 	name = "<invalid cpu vendor>";
-	if ((vendor < (ARRAY_SIZE(x86_vendor_name))) &&
-	    (x86_vendor_name[vendor] != 0))
+	if (vendor < ARRAY_SIZE(x86_vendor_name) &&
+	    x86_vendor_name[vendor])
 		name = x86_vendor_name[vendor];
 
 	return name;