MIPS: move unselectable FIT_IMAGE_FDT_EPM5 out of the "System type" choice

The reason is described in 5033ad56 ("MIPS: move unselectable
entries out of the "CPU type" choice").

At the same time, commit 101bd58f ("MIPS: Add support for Mobileye
EyeQ5") introduced another unselectable choice member.

(In fact, 5033ad56 and 101bd58f have the same commit time.)
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

arch/mips/Kconfig

@@ -619,15 +619,6 @@ config MACH_EYEQ5
 
 	bool
 
-config FIT_IMAGE_FDT_EPM5
-	bool "Include FDT for Mobileye EyeQ5 development platforms"
-	depends on MACH_EYEQ5
-	default n
-	help
-	  Enable this to include the FDT for the EyeQ5 development platforms
-	  from Mobileye in the FIT kernel image.
-	  This requires u-boot on the platform.
-
 config MACH_NINTENDO64
 	bool "Nintendo 64 console"
 	select CEVT_R4K
@@ -1011,6 +1002,15 @@ config CAVIUM_OCTEON_SOC
 
 endchoice
 
+config FIT_IMAGE_FDT_EPM5
+	bool "Include FDT for Mobileye EyeQ5 development platforms"
+	depends on MACH_EYEQ5
+	default n
+	help
+	  Enable this to include the FDT for the EyeQ5 development platforms
+	  from Mobileye in the FIT kernel image.
+	  This requires u-boot on the platform.
+
 source "arch/mips/alchemy/Kconfig"
 source "arch/mips/ath25/Kconfig"
 source "arch/mips/ath79/Kconfig"