ARM: at91: unused variable in at91_pm_verify_clocks

The code using the variable 'i' in this function is conditional which
results in a harmless compiler warning. Using the IS_ENABLED macro
instead of #ifdef makes the code look nicer and gets rid of the
warning.

Without this patch, building at91sam9263_defconfig results in:

/home/arnd/linux-arm/arch/arm/mach-at91/pm.c: In function 'at91_pm_verify_clocks':
/home/arnd/linux-arm/arch/arm/mach-at91/pm.c:137:6: warning: unused variable 'i' [-Wunused-variable]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 2c2d86505a54..5315f05896e9 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -153,7 +153,9 @@ static int at91_pm_verify_clocks(void)
                 }
         }
 
-#ifdef CONFIG_AT91_PROGRAMMABLE_CLOCKS
+        if (!IS_ENABLED(CONFIG_AT91_PROGRAMMABLE_CLOCKS))
+                return 1;
+
         /* PCK0..PCK3 must be disabled, or configured to use clk32k */
         for (i = 0; i < 4; i++) {
                 u32 css;
@@ -167,7 +169,6 @@ static int at91_pm_verify_clocks(void)
                         return 0;
                 }
         }
-#endif
 
         return 1;
 }