Disable linux-omap version of menelaus

Disable linux-omap version of menelaus

Fixes linker errors like this:

drivers/i2c/built-in.o: In function `menelaus_set_vdcdc':
lp5521.c:(.text+0x3910): multiple definition of `menelaus_set_vdcdc'
drivers/mfd/built-in.o:menelaus.c:(.text+0x95c): first defined here
drivers/i2c/built-in.o: In function `menelaus_set_vio':
lp5521.c:(.text+0x3990): multiple definition of `menelaus_set_vio'

Also remove drivers/i2c/chips/menelaus.c.

Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>