Revert "HACK (do not mainline): ARM: at91/dt: Extend HSMC regs range"

This reverts commit 3aa3ad2.

Saving and restoring the SMC regs and suspend and resume is not needed,
because in atmel_nand_controller_resume() we call nand_reset(), which calls
nand_setup_interface(), which calls ops->setup_interface(), which prepares
and writes the SMC registers (smcconf).
Tested on sama5d3_xplained with mtd_pagetest, after a suspend and a resume
cycle:
mtd_pagetest: finished with 0 errors

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>

Author: ambarus

arch/arm/boot/dts/sama5d3.dtsi

@@ -456,8 +456,7 @@
 				pmecc: ecc-engine@ffffc070 {
 					compatible = "atmel,at91sam9g45-pmecc";
 					reg = <0xffffc070 0x490>,
-					      <0xffffc500 0x100>,
-					      <0xffffc63c 0x14>;	/* SMC timing regs */
+					      <0xffffc500 0x100>;
 				};
 			};