flashchips: Add SST26VF080A

Simple 8Mbit SPI flash, with one caveat though: SFDP reports 0xd8 as
both 32KiB and 64KiB eraser.  The datasheet[1] lists this too in the
SFDP table,  however otherwise consistently states that erase blocks
are uniform, and lists 0x52 as the 32KiB eraser.  For now, we'll try
the latter.

[1] https://ww1.microchip.com/downloads/aemDocuments/documents/MPD/ProductDocuments/DataSheets/SST26VF080A-2.5V-3.0V-8-Mbit-Serial-Quad-IO-%28SQI%29-Flash-Memory-20006203C.pdf

Change-Id: I7d66ff23ef9ded7365e9c75a1aff0a68678a4ba0
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.sourcearcade.org/c/flashprog/+/263
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/include/flashchips.h b/include/flashchips.h
index 682a74d..2c73dd8 100644
--- a/include/flashchips.h
+++ b/include/flashchips.h
@@ -735,6 +735,7 @@
 #define SST_SST25VF032B		0x254A
 #define SST_SST25VF032B_REMS	0x4A	/* REMS or RES opcode */
 #define SST_SST25VF064C		0x254B
+#define SST_SST26VF080A		0x2618
 #define SST_SST26VF016		0x2601
 #define SST_SST26VF032		0x2602
 #define SST_SST26VF016B		0x2641