powerpc/xmon: replace sizeof calculations with ARRAY_SIZE macro

The calculations for operand/opcode/macro numbers are done in an
identical manner to the already existing ARRAY_SIZE macro in
linux/array_size.h

This patch replaces the sizeof calculations with the macro to make the
code cleaner and more immediately obvious what it is doing.

Signed-off-by: Ruben Wauters <[e-mail]>
Reviewed-by: Christophe Leroy <[e-mail]>
Signed-off-by: Madhavan Srinivasan <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

arch/powerpc/xmon/ppc-opc.c

···
   { 0xff, 11, NULL, NULL, PPC_OPERAND_SIGNOPT },
 };
 
-const unsigned int num_powerpc_operands = (sizeof (powerpc_operands)
-					   / sizeof (powerpc_operands[0]));
+const unsigned int num_powerpc_operands = ARRAY_SIZE(powerpc_operands);
 
 /* The functions used to insert and extract complicated operands.  */
 
···
 {"fcfidu.",	XRC(63,974,1),	XRA_MASK, POWER7|PPCA2,	PPCVLE,		{FRT, FRB}},
 };
 
-const int powerpc_num_opcodes =
-  sizeof (powerpc_opcodes) / sizeof (powerpc_opcodes[0]);
-
+const int powerpc_num_opcodes = ARRAY_SIZE(powerpc_opcodes);
+
 /* The VLE opcode table.
 
    The format of this opcode table is the same as the main opcode table.  */
···
 {"se_bl",	BD8(58,0,1),	BD8_MASK,	PPCVLE,	0,		{B8}},
 };
 
-const int vle_num_opcodes =
-  sizeof (vle_opcodes) / sizeof (vle_opcodes[0]);
-
+const int vle_num_opcodes = ARRAY_SIZE(vle_opcodes);
+
 /* The macro table.  This is only used by the assembler.  */
 
 /* The expressions of the form (-x ! 31) & (x | 31) have the value 0
···
 {"e_clrlslwi",4, PPCVLE, "e_rlwinm %0,%1,%3,(%2)-(%3),31-(%3)"},
 };
 
-const int powerpc_num_macros =
-  sizeof (powerpc_macros) / sizeof (powerpc_macros[0]);
+const int powerpc_num_macros = ARRAY_SIZE(powerpc_macros);