arm64: mm: use ubfm for dcache_line_size

Use 'ubfm' for the bitfield move instruction; thus, single
instruction can be used instead of two instructions, when
getting the minimum D-cache line size from CTR_EL0 register.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm64/mm/proc-macros.S

@@ -38,8 +38,7 @@
  */
 	.macro	dcache_line_size, reg, tmp
 	mrs	\tmp, ctr_el0			// read CTR
-	lsr	\tmp, \tmp, #16
-	and	\tmp, \tmp, #0xf		// cache line size encoding
+	ubfm	\tmp, \tmp, #16, #19		// cache line size encoding
 	mov	\reg, #4			// bytes per word
 	lsl	\reg, \reg, \tmp		// actual cache line size
 	.endm