MIPS: OCTEON: Replace SIZEOF_FIELD() macro

Switch to the standard sizeof_field() macro to find the size of a member
of a struct and remove the custom SIZEOF_FIELD() macro.
Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>
Link: https://lore.kernel.org/r/20190924105839.110713-4-pankaj.laxminarayan.bharadiya@intel.comCo-developed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>

arch/mips/cavium-octeon/executive/cvmx-bootmem.c

@@ -44,13 +44,6 @@ static struct cvmx_bootmem_desc *cvmx_bootmem_desc;
 
 /* See header file for descriptions of functions */
 
-/**
- * This macro returns the size of a member of a structure.
- * Logically it is the same as "sizeof(s::field)" in C++, but
- * C lacks the "::" operator.
- */
-#define SIZEOF_FIELD(s, field) sizeof(((s *)NULL)->field)
-
 /**
  * This macro returns a member of the
  * cvmx_bootmem_named_block_desc_t structure. These members can't
@@ -65,7 +58,7 @@ static struct cvmx_bootmem_desc *cvmx_bootmem_desc;
 #define CVMX_BOOTMEM_NAMED_GET_FIELD(addr, field)			\
 	__cvmx_bootmem_desc_get(addr,					\
 		offsetof(struct cvmx_bootmem_named_block_desc, field),	\
-		SIZEOF_FIELD(struct cvmx_bootmem_named_block_desc, field))
+		sizeof_field(struct cvmx_bootmem_named_block_desc, field))
 
 /**
  * This function is the implementation of the get macros defined