x86/idt: Remove address operator on function machine_check()

machine_check is function address, the address operator on it is nop for
compiler.

Make it consistent with the other function addresses in the same file.
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200419144049.1906-3-laijs@linux.alibaba.com

arch/x86/kernel/idt.c

@@ -93,7 +93,7 @@ static const __initconst struct idt_data def_idts[] = {
 	INTG(X86_TRAP_DB,		debug),
 
 #ifdef CONFIG_X86_MCE
-	INTG(X86_TRAP_MC,		&machine_check),
+	INTG(X86_TRAP_MC,		machine_check),
 #endif
 
 	SYSG(X86_TRAP_OF,		overflow),
@@ -186,7 +186,7 @@ static const __initconst struct idt_data ist_idts[] = {
 	ISTG(X86_TRAP_NMI,	nmi,		IST_INDEX_NMI),
 	ISTG(X86_TRAP_DF,	double_fault,	IST_INDEX_DF),
 #ifdef CONFIG_X86_MCE
-	ISTG(X86_TRAP_MC,	&machine_check,	IST_INDEX_MCE),
+	ISTG(X86_TRAP_MC,	machine_check,	IST_INDEX_MCE),
 #endif
 };