Prepare v2020.10-rc3

Signed-off-by: Tom Rini <trini@konsulko.com>

Makefile

diff --git a/Makefile b/Makefile
index d9a0881..5dd4c6b 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 VERSION = 2020
 PATCHLEVEL = 10
 SUBLEVEL =
-EXTRAVERSION = -rc2
+EXTRAVERSION = -rc3
 NAME =
 
 # *DOCUMENTATION*