ARM: OMAP2+: Fix undefined reference to omap_secure_init

omap_secure_init() is now called from all OMAP2+ platforms during their
init_early() call. This function is in omap-secure.o so include that
in the build for these platforms.

Fixes: db711893 ("ARM: OMAP2+: Add omap_secure_init callback hook for secure initialization")
Reported-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>
Tested-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/Makefile

@@ -16,11 +16,11 @@ hwmod-common				= omap_hwmod.o omap_hwmod_reset.o \
 clock-common				= clock.o
 secure-common				= omap-smc.o omap-secure.o
 
-obj-$(CONFIG_ARCH_OMAP2) += $(omap-2-3-common) $(hwmod-common)
+obj-$(CONFIG_ARCH_OMAP2) += $(omap-2-3-common) $(hwmod-common) $(secure-common)
 obj-$(CONFIG_ARCH_OMAP3) += $(omap-2-3-common) $(hwmod-common) $(secure-common)
 obj-$(CONFIG_ARCH_OMAP4) += $(hwmod-common) $(secure-common)
-obj-$(CONFIG_SOC_AM33XX) += $(hwmod-common)
-obj-$(CONFIG_SOC_OMAP5)	 += $(hwmod-common) $(secure-common)
+obj-$(CONFIG_SOC_AM33XX) += $(hwmod-common) $(secure-common)
+obj-$(CONFIG_SOC_OMAP5)  += $(hwmod-common) $(secure-common)
 obj-$(CONFIG_SOC_AM43XX) += $(hwmod-common) $(secure-common)
 obj-$(CONFIG_SOC_DRA7XX) += $(hwmod-common) $(secure-common)