[PATCH] ASoC: soc-component: fix undefined reference to __ffssi2

[Srinivas Kandagatla]

microblaze-linux-gcc (GCC) 9.3.0 complains about missing __ffssi2
symbol while using __builtin_ffs at runtime.

This is because arch/h8300 is compiled with -fno-builtin option.

so fallback and use kernel ffs() instead to all the arch builds happy!

Fixes: 1da0b9899abd ("ASoC: soc-component: add snd_soc_component_read/write_field())
Reported-by: kernel test robot <lkp at intel.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla at linaro.org>
---
 sound/soc/soc-component.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/soc-component.c b/sound/soc/soc-component.c
index 361a79d655e3..159bf88b9f8c 100644
--- a/sound/soc/soc-component.c
+++ b/sound/soc/soc-component.c
@@ -11,6 +11,7 @@
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
 #include <sound/soc.h>
+#include <linux/bitops.h>
 
 #define soc_component_ret(dai, ret) _soc_component_ret(dai, __func__, ret)
 static inline int _soc_component_ret(struct snd_soc_component *component,
@@ -43,7 +44,7 @@ static inline int soc_component_field_shift(struct snd_soc_component *component,
 		return 0;
 	}
 
-	return (__builtin_ffs(mask) - 1);
+	return (ffs(mask) - 1);
 }
 
 /*
-- 
2.21.0