nvmem: imx-ocotp: broaden Kconfig dependency

The i.MX OCOTP controller is used in numerous Freescale/NXP
SoCs from the MXC family, so the strict dependency on the
i.MX6 SoC is too narrow. Broaden it to cover all the MXC
familiy members.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/nvmem/Kconfig

@@ -25,8 +25,8 @@ config NVMEM_IMX_IIM
 	  will be called nvmem-imx-iim.
 
 config NVMEM_IMX_OCOTP
-	tristate "i.MX6 On-Chip OTP Controller support"
-	depends on SOC_IMX6 || SOC_IMX7D || COMPILE_TEST
+	tristate "i.MX 6/7/8 On-Chip OTP Controller support"
+	depends on ARCH_MXC || COMPILE_TEST
 	depends on HAS_IOMEM
 	help
 	  This is a driver for the On-Chip OTP Controller (OCOTP) available on