More fallout from "Allow symbol and label names to be enclosed in double quotes"

More fallout from "Allow symbol and label names to be enclosed in double quotes"

Some of the TC_START_LABEL implementations need to adjust the end of
the symbol, when a colon doesn't mean a label definition.  That means
they need access to nul_char both the restore the NUL location (it may
be a quote rather than a colon) and to store the new nul_char.  Others
need adjusting to step over a potential trailing quote.

	PR gas/18581
	* config/tc-aarch64.h (TC_START_LABEL): Redefine.
	* config/tc-arm.c (tc_start_label_without_colon): Delete params.
	Use input_line_pointer directly.
	* config/tc-arm.h (TC_START_LABEL): Redefine.
	(TC_START_LABEL_WITHOUT_COLON): Redefine.
	(tc_start_label_without_colon): Update prototype.
	* config/tc-bfin.c (bfin_start_label): Delete ptr param.  Check
	for NUL instead.
	* config/tc-bfin.h (bfin_start_label): Update prototype.
	(TC_START_LABEL): Redefine.
	* config/tc-d30v.h (TC_START_LABEL): Redefine.
	* config/tc-fr30.c (restore_colon): Rewrite.
	(fr30_is_colon_insn): Add nul_char param.  Return int.  Bump
	i_l_p over quote.  Update restore_colon calls.
	* config/tc-fr30.h (TC_START_LABEL): Redefine.
	(fr30_is_colon_insn): Update prototype.
	* config/tc-m32c.c (restore_colon, m32c_is_colon_insn): As above.
	* config/tc-m32c.h (TC_START_LABEL): Redefine.
	(m32c_is_colon_insn): Update prototype.
	* config/tc-m32r.h (TC_START_LABEL): Redefine.
	* config/tc-mep.h (TC_START_LABEL): Redefine.
	* config/tc-nds32.h (TC_START_LABEL): Redefine.
	* config/tc-tic54x.c (tic54x_start_label): Replace params with
	nul_char and next_char.  Step over trailing quote.
	* config/tc-tic54x.h (TC_START_LABEL_WITHOUT_COLON): Redefine.
	(tic54x_start_label): Update prototype.
	* read.c (TC_START_LABEL): Redefine.  Update invocation.
	(TC_START_LABEL_WITHOUT_COLON): Update invocation.
	* config/tc-nios2.c (s_nios2_set): Save initial input_line_pointer
	and restore if calling s_set.  Don't restore delim again.