sh: Disable PMB for SH4AL-DSP CPUs.

While the PMB is available on SH-4A parts, SH4AL-DSP parts exclude it
altogether. As such, explicitly disable PMB support for these parts. If
this changes in the future for newer subtypes, this will have to be made
more fine-grained.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/mm/Kconfig

@@ -82,7 +82,7 @@ config 32BIT
 
 config PMB_ENABLE
 	bool "Support 32-bit physical addressing through PMB"
-	depends on MMU && EXPERIMENTAL && CPU_SH4A
+	depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP
 	default y
 	help
 	  If you say Y here, physical addressing will be extended to
@@ -96,7 +96,7 @@ choice
 
 config PMB
 	bool "PMB"
-	depends on MMU && EXPERIMENTAL && CPU_SH4A
+	depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP
 	help
 	  If you say Y here, physical addressing will be extended to
 	  32-bits through the SH-4A PMB. If this is not set, legacy
@@ -104,7 +104,7 @@ config PMB
 
 config PMB_FIXED
 	bool "fixed PMB"
-	depends on MMU && EXPERIMENTAL && CPU_SH4A
+	depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP
 	select 32BIT
 	help
 	  If this option is enabled, fixed PMB mappings are inherited