Add qspi subclassing patch

Author: facchinm

patches/0177-QSPI-make-_qspi-object-protected-to-allow-subclassin.patch

@@ -0,0 +1,28 @@
+From a316902eaa2b438e71a40f0992fc8094058eaa63 Mon Sep 17 00:00:00 2001
+From: Martino Facchin <[email protected]>
+Date: Fri, 23 Sep 2022 09:51:20 +0200
+Subject: [PATCH] QSPI: make _qspi object protected to allow subclassing
+
+---
+ .../COMPONENT_QSPIF/include/QSPIF/QSPIFBlockDevice.h            | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/storage/blockdevice/COMPONENT_QSPIF/include/QSPIF/QSPIFBlockDevice.h b/storage/blockdevice/COMPONENT_QSPIF/include/QSPIF/QSPIFBlockDevice.h
+index 2903ecad32..695a396197 100644
+--- a/storage/blockdevice/COMPONENT_QSPIF/include/QSPIF/QSPIFBlockDevice.h
++++ b/storage/blockdevice/COMPONENT_QSPIF/include/QSPIF/QSPIFBlockDevice.h
+@@ -340,9 +340,11 @@ private:
+         QSPIF_BP_CLEAR_SR, // Clear protection bits in status register 1
+     };
+ 
++protected:
+     // QSPI Driver Object
+     mbed::QSPI _qspi;
+ 
++private:
+     // Static List of different QSPI based Flash devices csel that already exist
+     // Each QSPI Flash device csel can have only 1 QSPIFBlockDevice instance
+     // _devices_mutex is used to lock csel list - only one QSPIFBlockDevice instance per csel is allowed
+-- 
+2.37.3
+