msm: clock-pll: Use bit name macros in copper_pll_clk_enable

Replace use of the BIT() macro with #defines that are already
present for these bits.

Change-Id: If62269e3b9d089811ea28fdb0e4e7ac2aa86d00e
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
1 file changed