powerpc: P2041: Remove macro CONFIG_PPC_P2041

Replace CONFIG_PPC_P2041 with ARCH_P2041 in Kconfig and clean up
existing macros.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h
index dc8a696..cd47883 100644
--- a/arch/powerpc/include/asm/config_mpc85xx.h
+++ b/arch/powerpc/include/asm/config_mpc85xx.h
@@ -300,7 +300,7 @@
 #define CONFIG_SYS_FSL_ERRATUM_A004477
 #define CONFIG_USB_MAX_CONTROLLER_COUNT	1
 
-#elif defined(CONFIG_PPC_P2041) /* also supports P2040 */
+#elif defined(CONFIG_ARCH_P2041) /* also supports P2040 */
 #define CONFIG_SYS_FSL_QORIQ_CHASSIS1
 #define CONFIG_FSL_CORENET		/* Freescale CoreNet platform */
 #define CONFIG_MAX_CPUS			4
diff --git a/arch/powerpc/include/asm/fsl_secure_boot.h b/arch/powerpc/include/asm/fsl_secure_boot.h
index e65487c..a928aa2 100644
--- a/arch/powerpc/include/asm/fsl_secure_boot.h
+++ b/arch/powerpc/include/asm/fsl_secure_boot.h
@@ -62,7 +62,7 @@
 	defined(CONFIG_PPC_P4080) ||	\
 	defined(CONFIG_PPC_P5020) ||	\
 	defined(CONFIG_PPC_P5040) ||	\
-	defined(CONFIG_PPC_P2041)
+	defined(CONFIG_ARCH_P2041)
 	#define	CONFIG_FSL_TRUST_ARCH_v1
 #endif
 
diff --git a/arch/powerpc/include/asm/immap_85xx.h b/arch/powerpc/include/asm/immap_85xx.h
index ba0faa8..0388d4b 100644
--- a/arch/powerpc/include/asm/immap_85xx.h
+++ b/arch/powerpc/include/asm/immap_85xx.h
@@ -1856,7 +1856,7 @@
 #define FSL_CORENET_RCWSR11_EC2_FM1_DTSEC2		0x00080000
 #define FSL_CORENET_RCWSR11_EC2_USB2			0x00100000
 #endif
-#if defined(CONFIG_PPC_P2041) \
+#if defined(CONFIG_ARCH_P2041) \
 	|| defined(CONFIG_PPC_P3041) || defined(CONFIG_PPC_P5020)
 #define FSL_CORENET_RCWSR11_EC1_FM1_DTSEC4_RGMII	0x00000000
 #define FSL_CORENET_RCWSR11_EC1_FM1_DTSEC4_MII		0x00800000