powerpc/85xx: Fix description of MPC85xx and P1/P2 boards options

More MPC85xx and P1/P2 boards options have incorrect description. Fix them
to include list of all boards for which they enable/disable support.

Signed-off-by: Pali Rohár <pali@kernel.org>
Acked-by: Scott Wood <oss@buserror.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220709124305.17559-1-pali@kernel.org

arch/powerpc/platforms/85xx/Kconfig

@@ -62,13 +62,13 @@ config MPC85xx_CDS
 	  This option enables support for the MPC85xx CDS board
 
 config MPC85xx_MDS
-	bool "Freescale MPC85xx MDS"
+	bool "Freescale MPC8568 MDS / MPC8569 MDS / P1021 MDS"
 	select DEFAULT_UIMAGE
 	select PHYLIB if NETDEVICES
 	select HAVE_RAPIDIO
 	select SWIOTLB
 	help
-	  This option enables support for the MPC85xx MDS board
+	  This option enables support for the MPC8568 MDS, MPC8569 MDS and P1021 MDS boards
 
 config MPC8536_DS
 	bool "Freescale MPC8536 DS"
@@ -78,28 +78,30 @@ config MPC8536_DS
 	  This option enables support for the MPC8536 DS board
 
 config MPC85xx_DS
-	bool "Freescale MPC85xx DS"
+	bool "Freescale MPC8544 DS / MPC8572 DS / P2020 DS"
 	select PPC_I8259
 	select DEFAULT_UIMAGE
 	select FSL_ULI1575 if PCI
 	select SWIOTLB
 	help
-	  This option enables support for the MPC85xx DS (MPC8544 DS) board
+	  This option enables support for the MPC8544 DS, MPC8572 DS and P2020 DS boards
 
 config MPC85xx_RDB
-	bool "Freescale MPC85xx RDB"
+	bool "Freescale P102x MBG/UTM/RDB and P2020 RDB"
 	select PPC_I8259
 	select DEFAULT_UIMAGE
 	select FSL_ULI1575 if PCI
 	select SWIOTLB
 	help
-	  This option enables support for the MPC85xx RDB (P2020 RDB) board
+	  This option enables support for the P1020 MBG PC, P1020 UTM PC,
+	  P1020 RDB PC, P1020 RDB PD, P1020 RDB, P1021 RDB PC, P1024 RDB,
+	  P1025 RDB, P2020 RDB and P2020 RDB PC boards
 
 config P1010_RDB
-	bool "Freescale P1010RDB"
+	bool "Freescale P1010 RDB"
 	select DEFAULT_UIMAGE
 	help
-	  This option enables support for the MPC85xx RDB (P1010 RDB) board
+	  This option enables support for the P1010 RDB board
 
 	  P1010RDB contains P1010Si, which provides CPU performance up to 800
 	  MHz and 1600 DMIPS, additional functionality and faster interfaces