ARM: OMAP2+: omap_hwmod: Always restore saved hardreset context

Previously when restoring hardreset context during
omap_hwmod_restore_context we would only deassert the hardreset lines if
the module was previously active, however, if a hwmod has all hardresets
asserted then _enable will return without actually enabling the module.

This is a problem for the gfx hwmod on am437x as it gets disabled in
suspend path so it appears as disabled to the restore context code but
then during the attempted enable call during the regular kernel resume
path, the hwmod cannot actually be enabled.

Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>