staging: most-core: Fix checkpatch warnings

Hi,

This patch solves the following checkpatch.pl's messages in drivers/staging/most/core.c.

WARNING: line over 80 characters
+			return snprintf(buf, PAGE_SIZE, "%s", ch_data_type[i].name);

CHECK: Please use a blank line after function/struct/union/enum declarations
+}
+/**

Signed-off-by: Peikan Tsai <peikantsai@gmail.com>
Link: https://lore.kernel.org/r/20190825175849.GA74586@MarkdeMacBook-Pro.local


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>