ARM: OMAP4: Fix PMIC voltage domains for bionic

[ Upstream commit 30916faa ]

We are now registering the mpu domain three times instead of registering
mpu, core and iva domains like we should.

Fixes: d44fa156 ("ARM: OMAP2+: Configure voltage controller for cpcap")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>