MIPS: loongson: use IS_ENABLED()

Signed-off-by: NFlorian Fainelli <florian@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3336/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/mach-loongson/loongson.h

@@ -14,6 +14,7 @@
 #include <linux/io.h>
 #include <linux/init.h>
 #include <linux/irq.h>
+#include <linux/kconfig.h>
 
 /* loongson internal northbridge initialization */
 extern void bonito_irq_init(void);
@@ -66,7 +67,7 @@ extern int mach_i8259_irq(void);
 #include <linux/interrupt.h>
 static inline void do_perfcnt_IRQ(void)
 {
-#if defined(CONFIG_OPROFILE) || defined(CONFIG_OPROFILE_MODULE)
+#if IS_ENABLED(CONFIG_OPROFILE)
 	do_IRQ(LOONGSON2_PERFCNT_IRQ);
 #endif
 }