rockchip: remove unused config symbols

Remove MDIO and I2C bitbangig support from the kernel.

These functionalities are currently not used by any board in the target.

Signed-off-by: David Bauer <[email protected]>

target/linux/rockchip/armv8/config-5.4

@@ -188,7 +188,6 @@ CONFIG_I2C_ALGOBIT=y
 CONFIG_I2C_BOARDINFO=y
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_COMPAT=y
-CONFIG_I2C_GPIO=y
 CONFIG_I2C_HELPER_AUTO=y
 CONFIG_I2C_RK3X=y
 CONFIG_INDIRECT_PIO=y
@@ -238,7 +237,6 @@ CONFIG_MAGIC_SYSRQ_SERIAL=y
 CONFIG_MAILBOX=y
 # CONFIG_MAILBOX_TEST is not set
 CONFIG_MANDATORY_FILE_LOCKING=y
-CONFIG_MDIO_BITBANG=y
 CONFIG_MDIO_BUS=y
 CONFIG_MDIO_BUS_MUX=y
 CONFIG_MDIO_BUS_MUX_GPIO=y