Rename do_printk() to printk()

The indirection seems unnecessary. The macros throw features like
`-Wmisleading-indentation` off, though.

Default build for QEMU/Q35 is unchanged.

Change-Id: Ie4eab935a367b5ad6b38225c4973d41d9f70ef10
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51887
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

util/uio_usbdebug/console/printk.c

@@ -4,7 +4,7 @@
 #include <stdarg.h>
 #include <console/console.h>
 
-int do_printk(int msg_level, const char *const fmt, ...)
+int printk(int msg_level, const char *const fmt, ...)
 {
 	va_list args;
 	int i;