BugLink: https://bugs.launchpad.net/bugs/1822271

[ Upstream commit dc30e703 ]

In function omap4_dsi_mux_pads(), local variable "reg" could
be uninitialized if function regmap_read() returns -EINVAL.
However, it will be used directly in the later context, which
is potentially unsafe.
Signed-off-by: Yizhuo <yzhai003@ucr.edu>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Juerg Haefliger <juerg.haefliger@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>