re PR target/49868 (Implement named address space to place/access data in flash memory)

re PR target/49868 (Implement named address space to place/access data in flash memory)

	PR target/49868
	Rename __pgm to __flash.
	Rename __pgm1 to __flash1.
	Rename __pgm2 to __flash2.
	Rename __pgm3 to __flash3.
	Rename __pgm4 to __flash4.
	Rename __pgm5 to __flash5.
	Rename __pgmx to __memx.
	* doc/extend.texi (AVR Named Address Spaces)
	Rename address space names as indicated above.
	* config/avr/avr.c (avr_addrspace): Ditto.
	* config/avr/avr-protos.h
	(avr_mem_pgmx_p): Rename to avr_mem_memx_p.
	(avr_mem_pgm_p): Rename to avr_mem_flash_p.
	* config/avr/predicates.md: Ditto.
	* config/avr/avr.c Ditto, and
	(avr_decl_pgmx_p): Rename to avr_decl_memx_p.
	(avr_decl_pgm_p): Rename to avr_decl_flash_p.
	* config/avr/avr.h (ADDR_SPACE_PGM): Rename to ADDR_SPACE_FLASH.
	(ADDR_SPACE_PGM1): Rename to ADDR_SPACE_FLASH1.
	(ADDR_SPACE_PGM2): Rename to ADDR_SPACE_FLASH2.
	(ADDR_SPACE_PGM3): Rename to ADDR_SPACE_FLASH3.
	(ADDR_SPACE_PGM4): Rename to ADDR_SPACE_FLASH4.
	(ADDR_SPACE_PGM5): Rename to ADDR_SPACE_FLASH5.
	(ADDR_SPACE_PGMX): Rename to ADDR_SPACE_MEMX.
	* config/avr/avr.c: Ditto.
	* config/avr/avr.md: Ditto.

From-SVN: r183529