Convert chips to block_erasers: ST_M25PE10 ST_M25PE20 ST_M25PE40 ST_M25PE80 ST_M25PE16 PMC_25LV010 PMC_25LV016B PMC_25LV020 PMC_25LV040 PMC_25LV080B PMC_25LV512 PMC_39F010 PMC_49FL002 PMC_49FL004 SANYO_LE25FW203A SPANSION_S25FL016A
Added spi_block_erase_d7 for PMC chips.
Signed-off-by: Sean Nelson audiohacked@gmail.com