[U-Boot] i2c, avr32: fix compiler warning "input is not relaxable"

[Andreas Bießmann]

Dear Heiko Schocher,

Heiko Schocher <hs at denx.de> writes:
>compiling U-Boot for avr32 boards shows since
>commit 3d1957f0ea01 "dm: i2c: Add support for multiplexed I2C buses"
>this warning:
>
>Building current source for 4 boards (4 threads, 8 jobs per thread)
>     avr32:  +   atstk1002
>+(atstk1002) drivers/i2c/built-in.o: warning: input is not relaxable
>     avr32:  +   grasshopper
>+(grasshopper) drivers/i2c/built-in.o: warning: input is not relaxable
>     avr32:  +   atngw100
>+(atngw100) drivers/i2c/built-in.o: warning: input is not relaxable
>     avr32:  +   atngw100mkii
>+(atngw100mkii) drivers/i2c/built-in.o: warning: input is not relaxable
>    0    4    0 /4      0:00:16  : atngw100mkii
>
>Fix it.
>
>Signed-off-by: Heiko Schocher <hs at denx.de>
>Reviewed-by: Roger Meier <r.meier at siemens.com>
>Reviewed-by: Simon Glass <sjg at chromium.org>
>Reviewed-by: Andreas Bießmann <andreas.devel at googlemail.com>
>---
>
> drivers/i2c/Makefile | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)

applied to u-boot-avr32/master, thanks!

Best regards,
Andreas Bießmann