ARM: imx/pca100: only specify i2c device type once

The first argument to I2C_BOARD_INFO is used to assign .type, so it should
not be specified a second time.

For the rtc-pcf8563/pcf8563 entry gcc preferred pcf8563, so did I.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>