staging: kpc2000: kpc_i2c: reindent i2c_driver.c

i2c_driver.c uses a mixture of space and tab indentations which
conflicts with the kernel coding style guide. Reindent i2c_driver.c.
Signed-off-by: NGeordan Neukum <gneukum1@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>