arm: Introduce new CONFIG_SPL_SYS_NO_VECTOR_TABLE option

Move OMAP4 specific option for disabling overwriting vector table into
config option CONFIG_SPL_SYS_NO_VECTOR_TABLE.

Signed-off-by: Pali Rohár <pali@kernel.org>

arch/arm/Kconfig

@@ -57,6 +57,10 @@ config SYS_INIT_SP_BSS_OFFSET
 	  that the early malloc region, global data (gd), and early stack usage
 	  do not overlap any appended DTB.
 
+config SPL_SYS_NO_VECTOR_TABLE
+	depends on SPL
+	bool
+
 config LINUX_KERNEL_IMAGE_HEADER
 	depends on ARM64
 	bool

arch/arm/cpu/armv7/start.S

@@ -97,12 +97,10 @@ switch_to_hypervisor_ret:
 	orr	r0, r0, #0xc0		@ disable FIQ and IRQ
 	msr	cpsr,r0
 
+#if !CONFIG_IS_ENABLED(SYS_NO_VECTOR_TABLE)
 /*
  * Setup vector:
- * (OMAP4 spl TEXT_BASE is not 32 byte aligned.
- * Continue to use ROM code vector only in OMAP4 spl)
  */
-#if !(defined(CONFIG_OMAP44XX) && defined(CONFIG_SPL_BUILD))
 	/* Set V=0 in CP15 SCTLR register - for VBAR to point to vector */
 	mrc	p15, 0, r0, c1, c0, 0	@ Read CP15 SCTLR Register
 	bic	r0, #CR_V		@ V = 0

arch/arm/mach-omap2/Kconfig

@@ -32,6 +32,7 @@ config OMAP34XX
 config OMAP44XX
 	bool "OMAP44XX SoC"
 	select SPL_USE_TINY_PRINTF
+	select SPL_SYS_NO_VECTOR_TABLE if SPL
 	imply NAND_OMAP_ELM
 	imply NAND_OMAP_GPMC
 	imply SPL_DISPLAY_PRINT