powerpc/book3e: Add ICSWX/ACOP support to Book3e cores like A2

ICSWX is also used by the A2 processor to access coprocessors,
although not all "chips" that contain A2s have coprocessors.

Signed-off-by: Jimi Xenidis <jimix@pobox.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index a67105a..46d2a7c 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -236,7 +236,7 @@
 
 config PPC_ICSWX
 	bool "Support for PowerPC icswx coprocessor instruction"
-	depends on POWER4
+	depends on POWER4 || PPC_A2
 	default n
 	---help---