PCI: rcar: Pull bus clock enable/disable from rcar_pcie_get_resources()

The rcar_pcie_get_resources() is another misnomer with a side effect.
The function does not only get resources, but also enables/disables bus
clock. This is forgotten in the probe() function though and if anything
in probe() fails after rcar_pcie_get_resources() is called, the bus
clock are never disabled.

This patch pulls the clock handling out of the rcar_pcie_get_resources()
and enables clock after all the resources were requested. Moreover, this
patch also always disables the clock in case of failure.

Reported-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Marek Vasut <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Lorenzo Pieralisi <[email protected]>
Cc: Phil Edworthy <[email protected]>
Cc: Simon Horman <[email protected]>
Cc: Wolfram Sang <[email protected]>
Cc: [email protected]

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