Revert "bcm53xx: revert patch removing imprecise abort workaround"

This reverts commit r48961. It didn't fix PCIe host driver issue as
there are more aborts triggered by it.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 49120

target/linux/bcm53xx/patches-4.4/301-Revert-ARM-BCM5301X-remove-workaround-imprecise-abor.patch

@@ -1,66 +0,0 @@
-From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
-Date: Tue, 8 Mar 2016 09:03:21 +0100
-Subject: [PATCH] Revert "ARM: BCM5301X: remove workaround imprecise abort
- fault handler"
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-This reverts commit 937b12306ea79044c86f2e69b3061c7279245825.
-
-It seems imprecise external abort (0x1406) can be still happen on
-BCM4709 during PCI initialization.
-
-Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
----
-
---- a/arch/arm/mach-bcm/bcm_5301x.c
-+++ b/arch/arm/mach-bcm/bcm_5301x.c
-@@ -9,6 +9,40 @@
- #include <asm/hardware/cache-l2x0.h>
- 
- #include <asm/mach/arch.h>
-+#include <asm/siginfo.h>
-+#include <asm/signal.h>
-+
-+
-+static bool first_fault = true;
-+
-+static int bcm5301x_abort_handler(unsigned long addr, unsigned int fsr,
-+				 struct pt_regs *regs)
-+{
-+	if ((fsr == 0x1406 || fsr == 0x1c06) && first_fault) {
-+		first_fault = false;
-+
-+		/*
-+		 * These faults with codes 0x1406 (BCM4709) or 0x1c06 happens
-+		 * for no good reason, possibly left over from the CFE boot
-+		 * loader.
-+		 */
-+		pr_warn("External imprecise Data abort at addr=%#lx, fsr=%#x ignored.\n",
-+			addr, fsr);
-+
-+		/* Returning non-zero causes fault display and panic */
-+		return 0;
-+	}
-+
-+	/* Others should cause a fault */
-+	return 1;
-+}
-+
-+static void __init bcm5301x_init_early(void)
-+{
-+	/* Install our hook */
-+	hook_fault_code(16 + 6, bcm5301x_abort_handler, SIGBUS, BUS_OBJERR,
-+			"imprecise external abort");
-+}
- 
- static const char *const bcm5301x_dt_compat[] __initconst = {
- 	"brcm,bcm4708",
-@@ -18,5 +52,6 @@ static const char *const bcm5301x_dt_com
- DT_MACHINE_START(BCM5301X, "BCM5301X")
- 	.l2c_aux_val	= 0,
- 	.l2c_aux_mask	= ~0,
-+	.init_early	= bcm5301x_init_early,
- 	.dt_compat	= bcm5301x_dt_compat,
- MACHINE_END