[binutils-gdb] Split value_fetch_lazy

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT 41c60b4b2668947726fb5762de95d57b931a3200 ***

Author: Simon Marchi <simon.marchi@ericsson.com>
Branch: master
Commit: 41c60b4b2668947726fb5762de95d57b931a3200

Split value_fetch_lazy

While reading value_fetch_lazy, I thought it would be good to split it
in small functions (especially the part that handles lval_register).

gdb/ChangeLog:

	* value.c (value_fetch_lazy_bitfield): New.
	(value_fetch_lazy_memory): New.
	(value_fetch_lazy_register): New.
	(value_fetch_lazy): Factor out to smaller functions.