regulator: qpnp-regulator: print register values for unsupported regulators

Print out the type, subtype, and digital major revision register
values when a regulator fails to match supported variants.  This
will help when debugging PMIC simulator issues.

Change-Id: I4d0ca163921e6f14737df2977c39cf43b3d303d3
Signed-off-by: David Collins <collinsd@codeaurora.org>