Various ichspi.c refinements

* add a generic preop-opcode-pair table.

* rename ich_check_opcodes to ich_init_opcodes.

* let ich_init_opcodes do not need to access flashchip structure:
  . move the definition of struct preop_opcode_pair to a better place
  . remove preop_opcode_pairs from 'struct flashchip'
  . modify ich_init_opcodes and generate_opcodes so that they do not access the flashchip structure

* call ich_init_opcodes during chipset enable. Now OPCODES generation mechanism works.

* fix a coding style mistake.

Corresponding to flashrom svn r367 and coreboot v2 svn r3814.

Signed-off-by: FENG yu ning <fengyuning1984@gmail.com>
Acked-by: Peter Stuge <peter@stuge.se>
diff --git a/chipset_enable.c b/chipset_enable.c
index d2ae212..b5af401 100644
--- a/chipset_enable.c
+++ b/chipset_enable.c
@@ -339,6 +339,7 @@
 			printf("WARNING: SPI Configuration Lockdown activated.\n");
 			ichspi_lock = 1;
 		}
+		ich_init_opcodes();
 		break;
 	case BUS_TYPE_ICH9_SPI:
 		tmp2 = *(uint16_t *) (spibar + 0);