FUTURE SEQUANA: Fixed linker scripts for ARMC6

Also enabled ARMC6 compiler for FUTURE_SEQUANA family of targets.

targets/TARGET_Cypress/TARGET_PSOC6_FUTURE/TARGET_CY8C63XX/TARGET_MCU_PSOC6_M0/device/TOOLCHAIN_ARM_STD/cy8c6xx7_cm0plus.sct

@@ -142,7 +142,13 @@ LR_IROM1 FLASH_START (FLASH_SIZE - 0x8000)
         * (.noinit)
     }
     
-    ARM_LIB_STACK RAM_START+RAM_SIZE EMPTY -Stack_Size 
+    ; Application heap area (HEAP)
+    ARM_LIB_HEAP  +0
+    { 
+        * (HEAP) 
+    }
+
+    ARM_LIB_STACK RAM_START + RAM_SIZE EMPTY - Stack_Size 
     { ; Stack region growing down
     }
 }

targets/TARGET_Cypress/TARGET_PSOC6_FUTURE/TARGET_CY8C63XX/TARGET_MCU_PSOC6_M4/device/TOOLCHAIN_ARM_STD/cy8c6xx7_cm4_dual.sct

@@ -132,10 +132,6 @@ LR_IROM1 FLASH_START FLASH_SIZE
         .ANY (+RW, +ZI)
     }
     
-    ARM_LIB_STACK RAM_START+RAM_SIZE EMPTY -Stack_Size 
-    { ; Stack region growing down
-    }
-
     ; Place variables in the section that should not be initialized during the
     ; device startup.
     RW_IRAM1 +0 UNINIT
@@ -143,6 +139,16 @@ LR_IROM1 FLASH_START FLASH_SIZE
         * (.noinit)
     }
 
+    ; Application heap area (HEAP)
+    ARM_LIB_HEAP  +0
+    { 
+        * (HEAP) 
+    }
+
+    ARM_LIB_STACK RAM_START + RAM_SIZE EMPTY - Stack_Size 
+    { ; Stack region growing down
+    }
+
     ; Used for the digital signature of the secure application and the
     ; Bootloader SDK appication. The size of the section depends on the required
     ; data size.

targets/targets.json

@@ -8328,6 +8328,7 @@
     },
     "FUTURE_SEQUANA_M0": {
         "inherits": ["MCU_PSOC6_M0"],
+        "supported_toolchains": ["GCC_ARM", "ARM", "IAR"],
         "supported_form_factors": ["ARDUINO"],
         "extra_labels_add": ["PSOC6_FUTURE", "CY8C63XX", "FUTURE_SEQUANA"],
         "extra_labels_remove": ["PSOC6"],
@@ -8357,6 +8358,7 @@
     },
     "FUTURE_SEQUANA": {
         "inherits": ["MCU_PSOC6_M4"],
+        "supported_toolchains": ["GCC_ARM", "ARM", "IAR"],
         "supported_form_factors": ["ARDUINO"],
         "extra_labels_add": ["PSOC6_FUTURE", "CY8C63XX", "CORDIO"],
         "extra_labels_remove": ["PSOC6"],