linux gbmc-6.18-ast27xx: SRCREV bump 6d72cdb2b1..29f372f21c

Adrian Hunter (1):
      i3c: mipi-i3c-hci: Process multiple IBIs per interrupt

Rora Yang (1):
      drivers: bus: preserve AST1700 LTPI TX driving strength

Fusion-Link: fusion2 N/A
Tested: N/A
Google-Bug-Id: 445435578
Google-Bug-Id: 568203448
Change-Id: I883152af147c7a1a0fa26880c76f9583e48c0499
Signed-off-by: cmchang <cmchang@google.com>

meta-gbmc-staging

diff --git a/meta-gbmc-staging b/meta-gbmc-staging
index 8c3bc2a..59d66c9 160000
--- a/meta-gbmc-staging
+++ b/meta-gbmc-staging
@@ -1 +1 @@
-Subproject commit 8c3bc2a49de72530bfe62d016f75342a375c24e6
+Subproject commit 59d66c9241701f5c27ac832c5f7819b1da2045b8