video: fbdev: aty: radeon_pm: remove redundant CONFIG_PM container

Fixes commit 42ddb453 ("radeon: Conditionally compile PM code")

Before the above mentioned patch, codes between the line number 547 and
2803 were already inside "#ifdef CONFIG_PM" container. Thus, addition of
"#if defined(CONFIG_PM)" was not required in the patch. It also affected
the "#ifdef CONFIG_PPC_OF" container (line 1943-2510).

From the current snapshot of radeon_pm.c, remove:
    1434 | #if defined(CONFIG_PM)
and,
    2213 | #endif

This removes the redundant CONFIG_PM directive as well as fixes the
CONFIG_PPC (earlier CONFIG_PPC_OF) container.
Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Cc: Bjorn Helgaas <helgaas@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Bjorn Helgaas <bjorn@helgaas.com>
Cc: Vaibhav Gupta <vaibhav.varodek@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200907070221.29938-2-vaibhavgupta40@gmail.com

drivers/video/fbdev/aty/radeon_pm.c

@@ -1431,7 +1431,6 @@ static void radeon_pm_full_reset_sdram(struct radeonfb_info *rinfo)
 	mdelay( 15);
 }
 
-#if defined(CONFIG_PM)
 #if defined(CONFIG_X86) || defined(CONFIG_PPC_PMAC)
 static void radeon_pm_reset_pad_ctlr_strength(struct radeonfb_info *rinfo)
 {
@@ -2210,7 +2209,6 @@ static void radeon_reinitialize_M9P(struct radeonfb_info *rinfo)
 	radeon_pm_m10_enable_lvds_spread_spectrum(rinfo);
 }
 #endif
-#endif
 
 #if 0 /* Not ready yet */
 static void radeon_reinitialize_QW(struct radeonfb_info *rinfo)