Fixed initial dataset prefetch for RandomX v2

src/crypto/randomx/asm/program_prologue_linux.inc

@@ -13,12 +13,6 @@
 	mov rbp, qword ptr [rsi]    ;# "mx", "ma"
 	mov rdi, qword ptr [rsi+8]  ;# uint8_t* dataset
 
-	;# dataset prefetch for the first iteration of the main loop
-	mov rax, rbp
-	shr rax, 32
-	and eax, RANDOMX_DATASET_BASE_MASK
-	prefetchnta byte ptr [rdi+rax]
-
 	mov rsi, rdx                ;# uint8_t* scratchpad
 
 	mov rax, rbp