iommu: dart: DART_T8110_ERROR range should be 0 to 5

This was detected by smatch as one "else if" statement could never be
reached. Confirmed bit order by comparing with python implementation [1].

drivers/iommu/apple-dart.c:991 apple_dart_t8110_irq()
warn: duplicate check 'error_code == ((((1))) << (3))'
  (previous on line 989)

Link: AsahiLinux/m1n1@96b2d584feec1e3f7bfa [1]

Fixes: d8bcc87 ("iommu: dart: Add t8110 DART support")
Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Eric Curtin <[email protected]>
Reviewed-by: Sven Peter <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Joerg Roedel <[email protected]>

Author: ericcurtin

drivers/iommu/apple-dart.c

@@ -111,8 +111,8 @@
 
 #define DART_T8110_ERROR_MASK 0x104
 
-#define DART_T8110_ERROR_READ_FAULT BIT(4)
-#define DART_T8110_ERROR_WRITE_FAULT BIT(3)
+#define DART_T8110_ERROR_READ_FAULT BIT(5)
+#define DART_T8110_ERROR_WRITE_FAULT BIT(4)
 #define DART_T8110_ERROR_NO_PTE BIT(3)
 #define DART_T8110_ERROR_NO_PMD BIT(2)
 #define DART_T8110_ERROR_NO_PGD BIT(1)