Add flashcart features for CIC and Region (#138)

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## Description
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## Motivation and Context
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Some flashcarts may be old (which would include old 64drive's), and not
use the Ultra CIC, or old one that does not handle auto switching of
regions, we should have them as a feature switch.

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## Types of changes
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- [ ] Bug fix (fixes an issue)
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- [ ] Documentation Improvement
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has no impact on code or features)

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src/flashcart/64drive/64drive.c

@@ -75,6 +75,8 @@ static bool d64_has_feature (flashcart_features_t feature) {
         case FLASHCART_FEATURE_64DD: return false;
         case FLASHCART_FEATURE_RTC: return true;
         case FLASHCART_FEATURE_USB: return true;
+        case FLASHCART_FEATURE_AUTO_CIC: return true;
+        case FLASHCART_FEATURE_AUTO_REGION: return true;
         default: return false;
     }
 }

src/flashcart/flashcart.h

@@ -29,6 +29,8 @@ typedef enum {
     FLASHCART_FEATURE_64DD,
     FLASHCART_FEATURE_RTC,
     FLASHCART_FEATURE_USB,
+    FLASHCART_FEATURE_AUTO_CIC,
+    FLASHCART_FEATURE_AUTO_REGION,
 } flashcart_features_t;
 
 /** @brief Flashcart save type enumeration */

src/flashcart/sc64/sc64.c

@@ -254,6 +254,8 @@ static bool sc64_has_feature (flashcart_features_t feature) {
         case FLASHCART_FEATURE_64DD: return true;
         case FLASHCART_FEATURE_RTC: return true;
         case FLASHCART_FEATURE_USB: return true;
+        case FLASHCART_FEATURE_AUTO_CIC: return true;
+        case FLASHCART_FEATURE_AUTO_REGION: return true;
         default: return false;
     }
 }