ARM: dts: dra7xx-clocks: rename pcie clocks to accommodate second PHY instance

There are two instances of PCIe PHY in DRA7xx. So renamed
optfclk_pciephy_32khz, optfclk_pciephy_clk and optfclk_pciephy_div_clk to
optfclk_pciephy1_32khz, optfclk_pciephy1_clk and optfclk_pciephy1_div_clk
respectively. This is needed for adding the clocks for second PCIe PHY
instance.

Cc: Rajendra Nayak <rnayak@ti.com>
Cc: Tero Kristo <t-kristo@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Kumar Gala <galak@codeaurora.org>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>