meson: increase max post code per cycle

Since post code log exceeded the maximum size during a power cycle,
increase the maximum size to 20480.

Tested: Confirm that post code log for each power cycle has been
fully recorded.

Change-Id: Ie58c9bb3445a1ea88d39d0637827f9c9c07276d1
Signed-off-by: Colin Huang <colin.huang2@amd.com>
diff --git a/meson.options b/meson.options
index 2387b5d..eaf05c9 100644
--- a/meson.options
+++ b/meson.options
@@ -16,7 +16,7 @@
     'max-post-code-size-per-cycle',
     type: 'integer',
     min: 64,
-    max: 1024,
+    max: 20480,
     description: 'Maximum post code file size per cycle',
     value: 512,
 )