build(deps): bump third_party/litedram from `2c60861` to `e96710f`

Bumps [third_party/litedram](https://github.com/enjoy-digital/litedram) from `2c60861` to `e96710f`.
- [Commits](https://github.com/enjoy-digital/litedram/compare/2c60861929a317af697267d6219da43d10dcf1fa...e96710f0dd0d0137969f044c16f261c1abcbfee1)

---
updated-dependencies:
- dependency-name: third_party/litedram
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

third_party/litedram

diff --git a/third_party/litedram b/third_party/litedram
index 2c60861..e96710f 160000
--- a/third_party/litedram
+++ b/third_party/litedram
@@ -1 +1 @@
-Subproject commit 2c60861929a317af697267d6219da43d10dcf1fa
+Subproject commit e96710f0dd0d0137969f044c16f261c1abcbfee1