linux-next: build warning after merge of the rtc tree

[Stephen Rothwell]

Hi Alexandre,

After merging the rtc tree, today's linux-next build (x86_64 allmodconfig)
produced this warning:

In file included from drivers/rtc/rtc-stm32.c:14:0:
drivers/rtc/rtc-stm32.c: In function 'stm32_rtc_probe':
drivers/rtc/rtc-stm32.c:653:51: warning: large integer implicitly truncated to unsigned type [-Woverflow]
  regmap_update_bits(rtc->dbp, PWR_CR, PWR_CR_DBP, ~PWR_CR_DBP);
                                                   ^
include/linux/regmap.h:73:42: note: in definition of macro 'regmap_update_bits'
  regmap_update_bits_base(map, reg, mask, val, NULL, false, false)
                                          ^
drivers/rtc/rtc-stm32.c: In function 'stm32_rtc_remove':
drivers/rtc/rtc-stm32.c:675:51: warning: large integer implicitly truncated to unsigned type [-Woverflow]
  regmap_update_bits(rtc->dbp, PWR_CR, PWR_CR_DBP, ~PWR_CR_DBP);
                                                   ^
include/linux/regmap.h:73:42: note: in definition of macro 'regmap_update_bits'
  regmap_update_bits_base(map, reg, mask, val, NULL, false, false)
                                          ^

Introduced by commit

  4e64350f42e2 ("rtc: add STM32 RTC driver")

-- 
Cheers,
Stephen Rothwell