flashchips: Rename FEATURE_4BA_EXT_ADDR -> _EAR_C5C8

There are two competing sets of instructions to access the extended
address register of 4BA SPI chips. Some chips even support both sets.
To prepare for other instructions than the default 0xc5/0xc8, rename
the original feature flag.

Signed-off-by: Nico Huber <nico.h@gmx.de>
Change-Id: Iacb7b68a9e3444fe28873ff0fe5e3fab16643c8c
Ticket: https://ticket.coreboot.org/issues/357
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/64635
Original-Reviewed-by: Thomas Heijligen <src@posteo.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/70992
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/flashchips.c b/flashchips.c
index c398536..736f1b3 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -17403,7 +17403,7 @@
 		/* supports SFDP */
 		/* OTP: 1024B total, 256B reserved; read 0x48; write 0x42, erase 0x44, read ID 0x4B */
 		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP | FEATURE_4BA_ENTER_WREN |
-				  FEATURE_4BA_EXT_ADDR | FEATURE_4BA_READ | FEATURE_4BA_FAST_READ |
+				  FEATURE_4BA_EAR_C5C8 | FEATURE_4BA_READ | FEATURE_4BA_FAST_READ |
 				  FEATURE_WRSR2,
 		.tested		= TEST_OK_PREW,
 		.probe		= probe_spi_rdid,