net: mhi: Remove MBIM protocol

The MBIM protocol has now been integrated in a proper WWAN driver. We
can then revert back to a simpler driver for mhi_net, which is used
for raw IP or QMAP protocol (via rmnet link).

- Remove protocol management
- Remove WWAN framework usage (only valid for mbim)
- Remove net/mhi directory for simpler mhi_net.c file

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: Loic Poulain

drivers/net/Kconfig

@@ -431,10 +431,10 @@ config VSOCKMON
 config MHI_NET
 	tristate "MHI network driver"
 	depends on MHI_BUS
-	select WWAN
 	help
 	  This is the network driver for MHI bus.  It can be used with
-	  QCOM based WWAN modems (like SDX55).  Say Y or M.
+	  QCOM based WWAN modems for IP or QMAP/rmnet protocol (like SDX55).
+	  Say Y or M.
 
 endif # NET_CORE
 

drivers/net/Makefile

@@ -37,7 +37,7 @@ obj-$(CONFIG_GTP) += gtp.o
 obj-$(CONFIG_NLMON) += nlmon.o
 obj-$(CONFIG_NET_VRF) += vrf.o
 obj-$(CONFIG_VSOCKMON) += vsockmon.o
-obj-$(CONFIG_MHI_NET) += mhi/
+obj-$(CONFIG_MHI_NET) += mhi_net.o
 
 #
 # Networking Drivers