* read.c: Remove unneeded prototypes.

	* read.c: Remove unneeded prototypes.
	(s_comm): Split out code to..
	(s_comm_internal): ..here.  Tidy error returns.  Rearrange so that
	"name" from input line may be used in more places.  Merge code
	testing for valid size from elf_common.  Merge code from
	s_lcomm_internal.  Call comm_parse_extra.
	(bss_alloc): New function, split out of s_lcomm_internal and
	elf_common.
	(parse_align): Likewise.
	(s_lcomm_internal): Rewrite.
	(s_lcomm, s_lcomm_bytes): Use s_comm_internal.
	* read.h (bss_alloc, parse_align, s_comm_internal): Declare.
	* config/obj-elf.c (elf_common): Split out code to..
	(elf_common_parse): ..here.  Remove code common to s_comm_internal,
	parse_align and bss_alloc.  Rearrange and Tidy.
	* config/tc-alpha.h (TC_IMPLICIT_LCOMM_ALIGNMENT): Define.