ARM: imx: soc: Move default TEXT_BASE for i.MX7

Move i.MX7 TEXT_BASE/SPL_TEXT_BASE to Kconfig and common/spl/Kconfig
which is the best practice.

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/Kconfig b/Kconfig
index b1dd455..a7b2b6d 100644
--- a/Kconfig
+++ b/Kconfig
@@ -648,6 +648,7 @@
 	depends on HAVE_TEXT_BASE
 	default 0x0 if POSITION_INDEPENDENT
 	default 0x17800000 if ARCH_MX6
+	default 0x87800000 if ARCH_MX7
 	default 0x80800000 if ARCH_OMAP2PLUS || ARCH_K3
 	default 0x81700000 if MACH_SUNIV
 	default 0x2a000000 if MACH_SUN9I