ARM: dts: msm-4.4: Add axi clock and remove cpp rcg clk for msmcobalt

The axi clock is needed while voting for bus bandwidth and needs
to be turned on along with other cpp clocks, Remove cpp rcg clk.

CRs-Fixed: 1044777 1044373
Change-Id: I644cdf84c6cf71bcb8f4ea24c0efb9a3603ca435
Signed-off-by: Gautham Mayyuri <gmayyuri@codeaurora.org>