Kernel: Add support for SD host controllers on the PCI bus

Author: https://github.com/mrkct
Commit: 5fe6c6fc24
Pull-request: https://github.com/SerenityOS/serenity/pull/18139
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/Hendiadyoin1
Reviewed-by: https://github.com/supercomputer7 ✅

Kernel/Bus/PCI/Definitions.h

@@ -84,6 +84,7 @@ enum class ClassID {
     MassStorage = 0x1,
     Multimedia = 0x4,
     Bridge = 0x6,
+    Base = 0x8,
 };
 
 namespace MassStorage {
@@ -116,6 +117,14 @@ enum class SubclassID {
 
 }
 
+namespace Base {
+
+enum class SubclassID {
+    SDHostController = 0x5,
+};
+
+}
+
 AK_TYPEDEF_DISTINCT_ORDERED_ID(u8, CapabilityID);
 
 namespace Capabilities {