mmc: tegra: Don't skip tuning for 2nd core voltage

mmc: tegra: Don't skip tuning for 2nd core voltage

Even if nominal_vcore_tun_done, override_vcore_tun_done are set
don't skip tuning for 2nd core voltage.

Bug 1303886
Bug 1320195

Reviewed-on: http://git-master/r/242764
(cherry picked from commit 57b7008d0ad3cfdea888416e8b1db3ebb0c7cda7)
Change-Id: I8d60b950d29c897bd1c7c7775ccab40d6188f832
Signed-off-by: Naveen Kumar Arepalli <naveenk@nvidia.com>
Reviewed-on: http://git-master/r/246076
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Venu Byravarasu <vbyravarasu@nvidia.com>