clk: msm: gcc: Move emac rx clock from branch to gate clock

The clock gcc_emac_0_rx_clk clk_off bit gets toggled based on when the link
toggles with rx data. So the clk_off bit is not required to be polled for
when the branch is enabled, move the clock to gate_clk.

CRs-Fixed: 950598
Change-Id: Icb95598356044d82a03af3d95e77ed0af8f79e17
Signed-off-by: Taniya Das <tdas@codeaurora.org>