MIPS: PNX833x: Remove checks for CONFIG_I2C_PNX0105

Checks for CONFIG_I2C_PNX0105 were added in v2.6.28. But the related
Kconfig symbol has not been added to the tree. Remove these checks.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/6958/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>