driver: Print message with pr_err
print "already registered" message with pr_err() rather than printf() to
make sure it also appears in the logs.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 parent e76589f commit 71dd2e1b39e439a6c7ae5e65e6fdb7ae16fc831a
@Sascha Hauer Sascha Hauer authored on 14 Nov 2018
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drivers/base/driver.c