arch/powerpc: add fsl e5500 and e6500 support

Add Freescale E5500 and E6500 core support.
These can go in 32 or 64-bit mode.
I'm not aware of these being able to boot in LE mode so filter that out
until we get some feedback on it.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Reviewed-by: "Matt Weber" <matthew.weber@rockwellcollins.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

arch/Config.in.powerpc

@@ -109,6 +109,13 @@ config BR2_powerpc_e300c3
 config BR2_powerpc_e500mc
 	bool "e500mc"
 	depends on !BR2_ARCH_IS_64
+config BR2_powerpc_e5500
+	bool "e5500"
+	depends on !BR2_powerpc64le
+config BR2_powerpc_e6500
+	bool "e6500"
+	depends on !BR2_powerpc64le
+	select BR2_POWERPC_CPU_HAS_ALTIVEC
 config BR2_powerpc_power4
 	bool "power4"
 config BR2_powerpc_power5