ldr: fix rext fallback

Source/Atmosphere/stratosphere/loader/source/oc/pcv/erista/calculate_timings_erista.cpp

@@ -44,8 +44,8 @@ namespace ams::ldr::hoc::pcv::erista {
             return;
         }
 
-        /* > 3200 */
-        rext = 0x1E;
+        /* Fallback */
+        rext = 0x1A;
     }
 
     void SwitchLatency(volatile u32 &latency, u32 index, u32 latencyStep) {

Source/Atmosphere/stratosphere/loader/source/oc/pcv/mariko/calculate_timings_mariko.cpp

@@ -26,7 +26,7 @@ namespace ams::ldr::hoc::pcv::mariko {
             return;
         }
 
-        /* > 3200 */
+        /* Fallback */
         rext = 0x1E;
     }