rainier: make 64MB the pnor size

Tested: Verified mboxd started on rainier with 64M option

(From meta-ibm rev: 6116cd573167826b2080b32842a50251de1896ee)

Change-Id: I6ec47d582aa87afdc1155e87213670e54174c01b
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-ibm/meta-witherspoon/recipes-phosphor/mboxd/mboxd_%.bbappend b/meta-ibm/meta-witherspoon/recipes-phosphor/mboxd/mboxd_%.bbappend
index 9ead959..e23d8fa 100644
--- a/meta-ibm/meta-witherspoon/recipes-phosphor/mboxd/mboxd_%.bbappend
+++ b/meta-ibm/meta-witherspoon/recipes-phosphor/mboxd/mboxd_%.bbappend
@@ -1,5 +1,6 @@
 MBOXD_FLASH_SIZE_ibm-ac-server = "64M"
 MBOXD_FLASH_SIZE_mihawk = "64M"
+MBOXD_FLASH_SIZE_rainier = "64M"
 
 FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"