dts: atmel: samd: Fix reg address for NVM flash controller

dtc was producing this warning when we build on SAMD SoCs:
	Warning (simple_bus_reg): /soc/nvmctrl@41004000:
	simple-bus unit address format error, expected "40022000"

The reg addr isn't used by the flash_sam0.c driver so we wouldn't notice
this issue.  Looking at the atmel HAL we see:

	#define NVMCTRL           ((Nvmctrl  *)0x41004000UL)

So that provides confirmation of what the reg addr should be.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
1 file changed