kallsyms/printk: enable symbol printing support (%pS) ...

With this kallsyms finally start working at least on ARM. This
enables us resolving addresses into symbols which is particularly
useful in combination with stack unwinding support. As kallsyms
now compile and work we can remove the depends on BROKEN.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

doc: silence doxygen warnings ...

Silence these warnings:

common/kallsyms.c:8: Warning: documented function `const u8 kallsyms_names' was not declared or defined.
common/kallsyms.c:10: Warning: documented function `const u8 kallsyms_token_table' was not declared or defined.
common/kallsyms.c:11: Warning: documented function `const u16 kallsyms_token_index' was not declared or defined.
common/kallsyms.c:13: Warning: documented function `const unsigned long kallsyms_markers' was not declared or defined.

Signed-off-by: Robert Schwebel <r.schwebel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

add kallsyms from linux kernel