linux-imx

powerpc: Move boot_paca into early_setup

The powerpc boot_paca symbol is now only used within the
early_setup() routine, so move it from its global definition
into early_setup().

Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>