[PATCH] i2c: cadence: fix Kconfig dependency

[Sören Brinkmann]

Hi Wolfram,

On Sun, 2014-04-06 at 09:07PM +0200, Wolfram Sang wrote:
> During development, the driver first really needed to depend on
> COMMON_CLK only. Later, it was switched to writel_relaxed, but it was
> forgotten to update the dependencies, so build errors occured:
> 
> config: make ARCH=i386 allyesconfig
> 
> All error/warnings:
> 
>    drivers/i2c/busses/i2c-cadence.c: In function 'cdns_i2c_clear_bus_hold':
> >> drivers/i2c/busses/i2c-cadence.c:168:3: error: implicit declaration
> >> of function 'writel_relaxed' [-Werror=implicit-function-declaration]
> 
> Use a very safe dependency for now.

Thanks for taking care of this. Looks like the '_relaxed' IO helpers are
only available on ARM. I'll give that a try and might send a patch
eventually. I suspect 'ARM && COMMON_CLK' would work and be a little
less restrictive.

	Thanks,
	Sören