soc: renesas: Use "#ifdef" for single-symbol definition checks

Replace "#if defined(CONFIG_<foo>)" by "#ifdef CONFIG_<foo>" for
brevity.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/6026a3fe36735f0e6a0ecb037bf7c45f42aa3daf.1678705241.git.geert+renesas@glider.be

Author: geertu

drivers/soc/renesas/renesas-soc.c

@@ -373,20 +373,20 @@ static const struct of_device_id renesas_socs[] __initconst __maybe_unused = {
 #ifdef CONFIG_ARCH_R8A779G0
 	{ .compatible = "renesas,r8a779g0",	.data = &soc_rcar_v4h },
 #endif
-#if defined(CONFIG_ARCH_R9A07G043)
+#ifdef CONFIG_ARCH_R9A07G043
 #ifdef CONFIG_RISCV
 	{ .compatible = "renesas,r9a07g043",	.data = &soc_rz_five },
 #else
 	{ .compatible = "renesas,r9a07g043",	.data = &soc_rz_g2ul },
 #endif
 #endif
-#if defined(CONFIG_ARCH_R9A07G044)
+#ifdef CONFIG_ARCH_R9A07G044
 	{ .compatible = "renesas,r9a07g044",	.data = &soc_rz_g2l },
 #endif
-#if defined(CONFIG_ARCH_R9A07G054)
+#ifdef CONFIG_ARCH_R9A07G054
 	{ .compatible = "renesas,r9a07g054",	.data = &soc_rz_v2l },
 #endif
-#if defined(CONFIG_ARCH_R9A09G011)
+#ifdef CONFIG_ARCH_R9A09G011
 	{ .compatible = "renesas,r9a09g011",	.data = &soc_rz_v2m },
 #endif
 #ifdef CONFIG_ARCH_SH73A0