rpmsg: char: Rename rpmsg_char_init to rpmsg_chrdev_init

To be coherent with the other functions which are prefixed by
rpmsg_chrdev, rename the rpmsg_char_init function.
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20210311140413.31725-2-arnaud.pouliquen@foss.st.comSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

drivers/rpmsg/rpmsg_char.c

@@ -543,7 +543,7 @@ static struct rpmsg_driver rpmsg_chrdev_driver = {
 	},
 };
 
-static int rpmsg_char_init(void)
+static int rpmsg_chrdev_init(void)
 {
 	int ret;
 
@@ -569,7 +569,7 @@ static int rpmsg_char_init(void)
 
 	return ret;
 }
-postcore_initcall(rpmsg_char_init);
+postcore_initcall(rpmsg_chrdev_init);
 
 static void rpmsg_chrdev_exit(void)
 {