[PATCH] Fix PR target/19211, Ada bootstrap failure on ppc-darwin

[Andrew Pinski]

The problem here is that we are trying to use pic_offset_table_rtx when
we are in -mydynamic-no-pic mode.  We checked to see if the orig is
a register but we forgot to check if it is a subregister.  I cannot
find a C testcase for this though.

OK? Bootstrapped and tested on ppc-darwin with no regressions.

Thanks,
Andrew Pinski

ChangeLog:

	* config/darwin.c (machopic_legitimize_pic_address): If the orig
	is subregister return orig.

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