bus: mhi: host: Update mhi driver description

This should be a mistake. MHI contains "Host Interface"
already. So we shall update "MHI" to "Modem" and the full
name shall be "Modem Host Interface".
Signed-off-by: NSlark Xiao <slark_xiao@163.com>
Reviewed-by: NManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20221229011358.15874-1-slark_xiao@163.comSigned-off-by: NManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

drivers/bus/mhi/host/init.c

@@ -1449,4 +1449,4 @@ postcore_initcall(mhi_init);
 module_exit(mhi_exit);
 
 MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("MHI Host Interface");
+MODULE_DESCRIPTION("Modem Host Interface");