ngd_slim: Fix return paths in transfer function

Return right away if resume fails when runtime-pm is not
enabled. Consolidate return paths if controller power-on
vote fails when runtime-pm is enabled.

CRs-Fixed: 677689
Change-Id: Ia8887dd87df6dba4f93638650794bfcdc7d1ff75
Signed-off-by: Sagar Dharia <sdharia@codeaurora.org>