No functional change, just a readability fix.

The symbolic name of the shift value used in writing
CM_AUTOIDLE_PLL_IVA2 referred values in the CM_CLKSTCTRL_IVA2
register.  Fix this to use the AUTOIDLE fields.
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>