arch/Kconfig: fix spelling mistakes

There are a few spelling mistakes in the Kconfig comments and help text.
Fix these.

Link: https://lkml.kernel.org/r/20201207155004.171962-1-colin.king@canonical.comSigned-off-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/Kconfig

@@ -261,7 +261,7 @@ config ARCH_HAS_SET_DIRECT_MAP
 
 #
 # Select if the architecture provides the arch_dma_set_uncached symbol to
-# either provide an uncached segement alias for a DMA allocation, or
+# either provide an uncached segment alias for a DMA allocation, or
 # to remap the page tables in place.
 #
 config ARCH_HAS_DMA_SET_UNCACHED
@@ -314,14 +314,14 @@ config ARCH_32BIT_OFF_T
 config HAVE_ASM_MODVERSIONS
 	bool
 	help
-	  This symbol should be selected by an architecure if it provides
+	  This symbol should be selected by an architecture if it provides
 	  <asm/asm-prototypes.h> to support the module versioning for symbols
 	  exported from assembly code.
 
 config HAVE_REGS_AND_STACK_ACCESS_API
 	bool
 	help
-	  This symbol should be selected by an architecure if it supports
+	  This symbol should be selected by an architecture if it supports
 	  the API needed to access registers and stack entries from pt_regs,
 	  declared in asm/ptrace.h
 	  For example the kprobes-based event tracer needs this API.
@@ -336,7 +336,7 @@ config HAVE_RSEQ
 config HAVE_FUNCTION_ARG_ACCESS_API
 	bool
 	help
-	  This symbol should be selected by an architecure if it supports
+	  This symbol should be selected by an architecture if it supports
 	  the API needed to access function arguments from pt_regs,
 	  declared in asm/ptrace.h