libopenbmc_intf: Fix non-arm devmem implementation

Fixes the following error:

 In file included from button_reset_obj.c:4:0:
 ../libopenbmc_intf/openbmc.h:39:15: error: return type defaults to ‘int’ [-Werror=implicit-int]
 static inline devmem(uint32_t val, uint32_t reg)

Signed-off-by: Joel Stanley <joel@jms.id.au>
1 file changed