ARM: dts: msm: remove pcie_power_en_vreg in fsm9900

The regulator for pcie0_power_en_vreg and pcie1_power_en_vreg are
removed from fsm9900 device tree. These regulators are enabled
by bootloaders and should not be turned off.

Change-Id: I5b85722c11ee48f943a8b5b039ae820ab7f13a2e
Acked-by: Chemin Hsieh <cheminh@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>