sh: mm: Remove checks for nonexistent CONFIG_CPU_SUBTYPE_ST40

The CONFIG_CPU_SUBTYPE_ST40 option was removed in commit f96691872439 ("sh: Kill off the remaining ST40 cruft."), but a check for it was added later in commit d02b08f6e8b184ff ("sh: Clean up places that make 29-bit physical assumptions."). Remove this dead code. Also remove the definition of and references to the MMUCR_SE bit mask, because it is defined as zero on all CPUs other than ST40.

Discovered while searching for CONFIG_* symbols referenced in code but not defined in any Kconfig file.

---
Changes in v2: Correctly indicate that the check was added after ST40 support was removed (thanks Geert)

 arch/sh/include/cpu-sh4/cpu/mmu_context.h | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

index 421b56d5c595..4a6148e1ea84 100644
@@ -43,12 +43,6 @@
 #define MMUCR_URC		0x0000FC00
 #define MMUCR_URC_SHIFT		10
 
-#if defined(CONFIG_32BIT) && defined(CONFIG_CPU_SUBTYPE_ST40)
-#define MMUCR_SE		(1 << 4)
-#else
-#define MMUCR_SE		(0)
-#endif
-
 #ifdef CONFIG_CPU_HAS_PTEAEX
 #define MMUCR_AEX		(1 << 6)
 #else

@@ -69,7 +63,7 @@
 
 #define MMU_NTLB_ENTRIES	64
 #define MMU_CONTROL_INIT	(MMUCR_AT | MMUCR_TI | MMUCR_SQMD | \
-				 MMUCR_ME | MMUCR_SE | MMUCR_AEX)
+				 MMUCR_ME | MMUCR_AEX)
 
 #define TRA	0xff000020
 #define EXPEVT	0xff000024

2.43.0