stm32: flash: ospi: Fix erase if flash is larger than 16MB

Opcodes for erase is taken from jedec basic flash parameter table
These expects 3 byte addresses.

When running with 4 byte addresses, opcodes to be used shall be taken
from JEDEC 4-byte Address Instruction Parameter table

Signed-off-by: Brian Juel Folkmann <bju@trackunit.com>