[PATCH] ppc64: update lparcfg to use seq_file

[PATCH] ppc64: update lparcfg to use seq_file

From: Will Schmidt <willschm@us.ibm.com>

This patch includes updates and cleanup for the PPC64 proc/lparcfg interface.
     - use seq_file's seq_printf for output
     - remove redundant e2a function. (use viopath.c's instead)
     - change to Kconfig to allow building as a module.
     - export required symbols from LparData.c

    Pass # 2 updates..
      - Per Pauls request I've removed the vpurr references, and left
	just a stub function get_purr().
      - this should apply clean to latest linus tree.  (test-applied against
	2.6.7-rc3).

    Pass # 3 updates...
      - Correcting my previously incorrect description of the
	lparcfg_count_active_processors() function..
	This is for the cases where we have some number of virtual
	processors that are different than the total number of threads
	in the system.  (i.e. systemcfg->processorcount isnt the desired
	value for partition_active_processors)
      - moved e2a function into its own file in arch/ppc64/lib.
      - changed lparcfg_count_active_processors() to use a while loop
	instead of a for loop.
      - removed redundant of_node_put in lparcfg_count_active_processors().
      - removed unneeded parms from get-system-parameter rtas_call.

Signed-off-by: Will Schmidt <willschm@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>