powerpc/Makefile: Don't prefix archhelp commands with "@"

It's not necessary to prefix every command in archhelp with "@" (to
suppress echoing the command), because that is done by the top level
Makefile when it evaluates archhelp.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230329072334.2023357-1-mpe@ellerman.id.au

arch/powerpc/Makefile

@@ -332,25 +332,25 @@ ppc64_randconfig:
 		-f $(srctree)/Makefile randconfig
 
 define archhelp
-  @echo '* zImage          - Build default images selected by kernel config'
-  @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
-  @echo '  uImage          - U-Boot native image format'
-  @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
-  @echo '                    versions which do not support device trees'
-  @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
-  @echo '  simpleImage.<dt> - Firmware independent image.'
-  @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
-  @echo '  install         - Install kernel using'
-  @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
-  @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
-  @echo '                    install to $$(INSTALL_PATH) and run lilo'
-  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
-  @echo ''
-  @echo '  Targets with <dt> embed a device tree blob inside the image'
-  @echo '  These targets support board with firmware that does not'
-  @echo '  support passing a device tree directly.  Replace <dt> with the'
-  @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
-  @echo '  (minus the .dts extension).'
+  echo '* zImage          - Build default images selected by kernel config'
+  echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
+  echo '  uImage          - U-Boot native image format'
+  echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
+  echo '                    versions which do not support device trees'
+  echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
+  echo '  simpleImage.<dt> - Firmware independent image.'
+  echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
+  echo '  install         - Install kernel using'
+  echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
+  echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
+  echo '                    install to $$(INSTALL_PATH) and run lilo'
+  echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
+  echo ''
+  echo '  Targets with <dt> embed a device tree blob inside the image'
+  echo '  These targets support board with firmware that does not'
+  echo '  support passing a device tree directly.  Replace <dt> with the'
+  echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
+  echo '  (minus the .dts extension).'
 endef
 
 PHONY += install