Update boards.txt

Fixed MCU name for AB01-V2 and AM01-V2

Author: eiannone

boards.txt

@@ -111,7 +111,7 @@ CubeCell-Board-V2.upload.wait_for_upload_port=true
 
 CubeCell-Board-V2.build.board=CubeCell_Board_V2
 CubeCell-Board-V2.build.core=asr650x
-CubeCell-Board-V2.build.mcu=ASR6501
+CubeCell-Board-V2.build.mcu=ASR6502
 CubeCell-Board-V2.build.f_cpu=48000000L
 CubeCell-Board-V2.build.variant=CubeCell-Board-V2
 
@@ -384,7 +384,7 @@ CubeCell-Module-V2.upload.wait_for_upload_port=true
 
 CubeCell-Module-V2.build.board=CubeCell_Module_V2
 CubeCell-Module-V2.build.core=asr650x
-CubeCell-Module-V2.build.mcu=ASR6501
+CubeCell-Module-V2.build.mcu=ASR6502
 CubeCell-Module-V2.build.f_cpu=48000000L
 CubeCell-Module-V2.build.variant=CubeCell-Module-V2
 
@@ -912,4 +912,4 @@ CubeCell-Board-PRO.menu.LORAWAN_DebugLevel.0.build.LORAWAN_DebugLevel=0
 CubeCell-Board-PRO.menu.LORAWAN_DebugLevel.1=Freq
 CubeCell-Board-PRO.menu.LORAWAN_DebugLevel.1.build.LORAWAN_DebugLevel=1
 CubeCell-Board-PRO.menu.LORAWAN_DebugLevel.2=Freq && DIO
-CubeCell-Board-PRO.menu.LORAWAN_DebugLevel.2.build.LORAWAN_DebugLevel=2
+CubeCell-Board-PRO.menu.LORAWAN_DebugLevel.2.build.LORAWAN_DebugLevel=2