allow nvram partition or 9fat!nvram to be on standard sata drive letters E and F.

Reference: /n/sources/patch/applied/authsrv-sata-nvram
Date: Sat Sep 16 09:04:09 CES 2006
Signed-off-by: quanstro@quanstro.net

--- /sys/src/libauthsrv/readnvram.c	Sat Sep 16 09:03:03 2006
+++ /sys/src/libauthsrv/readnvram.c	Sat Sep 16 09:02:55 2006
@@ -31,6 +31,10 @@
 	"pc", "#S/sdC1/9fat", -1, sizeof(Nvrsafe),
 	"pc", "#S/sdD0/nvram", 0, sizeof(Nvrsafe),
 	"pc", "#S/sdD0/9fat", -1, sizeof(Nvrsafe),
+	"pc", "#S/sdE0/nvram", 0, sizeof(Nvrsafe),
+	"pc", "#S/sdE0/9fat", -1, sizeof(Nvrsafe),
+	"pc", "#S/sdE0/nvram", 0, sizeof(Nvrsafe),
+	"pc", "#S/sdE0/9fat", -1, sizeof(Nvrsafe),
 	"pc", "#S/sd00/nvram", 0, sizeof(Nvrsafe),
 	"pc", "#S/sd00/9fat", -1, sizeof(Nvrsafe),
 	"pc", "#S/sd01/nvram", 0, sizeof(Nvrsafe),