meta-aspeed: socsec-sign: Fix comment about SRAM layout

It mistakenly refers to SDRAM, which doesn't make sense in context.

Change-Id: I1890b4b87ddc7592f28cdcd1957952dd8bdfaba7
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/meta-aspeed/classes/socsec-sign.bbclass b/meta-aspeed/classes/socsec-sign.bbclass
index f46147d..d81a865 100644
--- a/meta-aspeed/classes/socsec-sign.bbclass
+++ b/meta-aspeed/classes/socsec-sign.bbclass
@@ -8,7 +8,7 @@
 SOCSEC_SIGN_ALGO ?= "RSA4096_SHA512"
 SOCSEC_SIGN_HELPER ?= ""
 # u-boot-aspeed-sdk commit '2c3b53489c ast2600: Modify SPL SRAM layout'
-# changes the SDRAM layout so that the verification region does NOT
+# changes the SRAM layout so that the verification region does NOT
 # intersects the stack. The parameter below can be used to instruct
 # socsec to work in either mode (ommitting it throws a warning), but
 # newer (post v00.03.03) u-boot-aspeed-sdk need this set to false