fix(cpus): fix cpu version check for Neoverse N2, V1

The CPU version check was moved wrongly down in N2 and missing in V1.
The patch fixes the issues.

Signed-off-by: Bipin Ravi <bipin.ravi@arm.com>
Change-Id: Icb6e5285d6cc97fbe416fe1f0b1ab7afbd8a8809
diff --git a/lib/cpus/aarch64/neoverse_n2.S b/lib/cpus/aarch64/neoverse_n2.S
index a807b63..72e5ca8 100644
--- a/lib/cpus/aarch64/neoverse_n2.S
+++ b/lib/cpus/aarch64/neoverse_n2.S
@@ -429,6 +429,10 @@
 	orr	x0, x0, #NEOVERSE_N2_CPUACTLR2_EL1_BIT_2
 	msr	NEOVERSE_N2_CPUACTLR2_EL1, x0
 
+	/* Get the CPU revision and stash it in x18. */
+	bl	cpu_get_rev_var
+	mov	x18, x0
+
 #if ERRATA_DSU_2313941
 	bl	errata_dsu_2313941_wa
 #endif
@@ -510,9 +514,6 @@
 	msr	NEOVERSE_N2_CPUECTLR_EL1, x0
 #endif
 
-	bl	cpu_get_rev_var
-	mov	x18, x0
-
 #if ERRATA_N2_2002655
 	mov	x0, x18
 	bl	errata_n2_2002655_wa